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Journal articles on the topic 'DEPT-NMR'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Newmark, Richard A. "DEPT NMR Spectra of Copolymers." Applied Spectroscopy 39, no. 3 (1985): 507–12. http://dx.doi.org/10.1366/0003702854248674.

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DEPT (Distortionless Enhancement by Polarization Transfer) spectra have been obtained on eight commercial polymers in order that the general applicability of this new multipulse technique for the assignment of carbon multiplicity in their proton noise decoupled 13C NMR spectra might be assessed. The spin-lattice and spin-spin relaxation times have been measured and correlated with the quality of the edited DEPT spectra.

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2

Díaz T., Eduardo, Christopher K. Jankowski, Celine Hocquelet, Federico del Rio P. та Héctor Barrios. "The unambiguous assignment of NMR spectra of per-O-methylated 6-mono and 6,6-diamino-β-cyclodextrins". Canadian Journal of Chemistry 86, № 7 (2008): 726–36. http://dx.doi.org/10.1139/v08-063.

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The step-by-step analysis of high-resolution proton and 13C NMR spectra of per-O-methylated-6-monoamino and 6,6-diamino-A,D-β-cyclodextrins is described. Selected 2-D experiments (COSY, NOESY, HSQC, DEPT, and HMBC) allowed us to challenge the current interpretation. The full assignment of the proton and carbon-13 NMR spectra of these two compounds was performed enabling us to complete the assignment of NMR spectra acquired at 500 and 800 MHz for these important synthetic intermediates.Key words: COSY, NOESY, HSQC, DEPT, HMBC, NMR, 6-amino-β-cyclodextrins, 6,6-diamino-β-cyclodextrins.

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3

Cabrita, Maria João, Arona Pires, Anthony J. Burke, and Raquel Garcia. "Seeking a Fast Screening Method of the Varietal Origin of Olive Oil: The Usefulness of an NMR-Based Approach." Foods 10, no. 2 (2021): 399. http://dx.doi.org/10.3390/foods10020399.

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This work encompasses the use of 1D multinuclear NMR spectroscopy, namely, 1H NMR and 13C NMR DEPT 45, combined with a multivariate statistical analysis to characterize olive oils produced from nine different varieties: Galega Vulgar, Cobrançosa, Cordovil de Serpa, Blanqueta, Madural, Verdeal Alentejana, Arbequina, Picual and Carrasquenha. Thus, the suitability of an NMR-based spectroscopic tool to discriminate olive oils according to their varietal origin is addressed. The results obtained show that the model based on 13C NMR DEPT 45 data has a stronger performance than the model based on 1H

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4

Gurst, Jerome E. "Computer-Generated Edited DEPT NMR Spectra." Journal of Chemical Education 71, no. 3 (1994): 234. http://dx.doi.org/10.1021/ed071p234.1.

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5

D'Agostino, Carmine, Mick D. Mantle, and Lynn F. Gladden. "In situ high-pressure 13C/1H NMR reaction studies of benzyl alcohol oxidation over a Pd/Al2O3 catalyst." Reaction Chemistry & Engineering 5, no. 6 (2020): 1053–57. http://dx.doi.org/10.1039/c9re00489k.

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6

Lesbani, Aldes, Addy Rachmat, Risfidian Mohadi, and Eliza Eliza. "PENGGUNAAN KATALIS PALADIUM DALAM REAKSI ARILASI n-OKTILSILAN DENGAN 2-IODIDA-5-METIL TIOFEN." Molekul 9, no. 1 (2014): 18. http://dx.doi.org/10.20884/1.jm.2014.9.1.146.

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Telah dilakukan proses arilasi n-oktilsilan dengan 2-iodida-5-metil tiofen mengunakan katalis palladium dengan teknik reaksi kopling untuk mendapatkan variasi senyawa hasil arilasi. Produk hasil arilasi yang terbentuk dimurnikan dengan metode kromatografi kolom silika dengan eluen etil asetat dan dikarakterisasi menggunakan spektroskopi massa, spektroskopi 1H NMR, 13C NMR, dan DEPT-135. Hasil penelitian menunjukkan bahwa senyawa yang terbentuk dari hasil arilasi yakni tris(5-metil-2-tiofen)oktilsilan yang berupa cairan tak berwarna dengan nilaim/z sebesar 432. Hasil pengukuran menggunakan spek

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7

Rahman, S. M. Mizanur, Serajum Munira, and M. Amzad Hossain. "PHYTOCHEMICAL STUDY OF THE ARIAL PARTS OF Cleome rutidosperma DC PLANT." Indonesian Journal of Chemistry 8, no. 3 (2010): 459–62. http://dx.doi.org/10.22146/ijc.21606.

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Two new compounds were identified as 2-ethyl-cyclohex-2-ene-6-hydroxy-methylene-1-carboxylic acid and 3b-hydroxy-lup-20(29)-en-28-oic acid, respectively, from the petroleum ether extracts of Cleome rutidosperma plant. These two constituents is the first time occurrence in this plant. The structures of the two different type of compounds are elucidated with the help of UV, IR, 1H-NMR, 13C-NMR, COSY, DEPT 90, DEPT 135 and mass spectral data. Keywords: Cleome rutidosperm DC; isolation; spectral analysis

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8

Clough, R. S., and J. L. Koenig. "Solid-State Carbon-13 NMR Studies of Vulcanized Elastomers. VII. Sulfur-Vulcanized Cis-1,4 Polybutadiene at 75.5 Mhz." Rubber Chemistry and Technology 62, no. 5 (1989): 908–27. http://dx.doi.org/10.5254/1.3536283.

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Abstract Solid-state C-13 NMR spectroscopy provides a wealth of chemical information concerning sulfur-vulcanized cis-l,4-polybutadiene. New resonances which appear upon curing have chemical shifts which are expected for crosslink and cyclic structures. The DEPT experiment with MAS worked well for the polybutadiene vulcanizate in the solid state. DEPT is very useful as an aid in the assignment of structures to resonances. The new resonances can be assigned to more than one type of structure given only chemical shift and DEPT information. Swelling measurements indicate the majority of the reson

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9

Mohamed, Abou El-Hamd H., Hosam-Eldin H. Mahmoud, Fathy F. Abdellatif, Yousif S. Mohamed, and Ahmed A. Ahmed. "New Guaianolide-Type Sesquiterpene Lactones from Inula verbascifolia." Zeitschrift für Naturforschung C 68, no. 5-6 (2013): 175–80. http://dx.doi.org/10.1515/znc-2013-5-602.

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The aerial parts of Inula verbascifolia afforded two new guaianolide-type sesquiterpene lactones. Their structures were determined by spectroscopic methods (IR, MS, 1H NMR, 13C NMR, DEPT, 1H-1H COSY, HMQC, and HMBC).

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10

Jiang, Ai, Margrate Anyanwu, Kafai Leong, et al. "3-[(1H-Benzo[d][1,2,3]triazol-1-yl)oxy]propyl 9-hydroxy-5a,5b,8,8,11a-pentamethyl-1-(prop-1-en-2-yl)icosahydro-3aH-cyclopenta[a]chrysene-3a-carboxylate." Molbank 2022, no. 3 (2022): M1419. http://dx.doi.org/10.3390/m1419.

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We herein report on the synthesis of a pentacyclic triterpene functionalized through derivation of betulinic acid with hydroxybenzotriazole. The compound was fully characterized by proton (1H-NMR), carbon-13 (13C-NMR), heteronuclear single quantum coherence (HSQC) and distortionless enhancement by polarization transfer (DEPT-135 and DEPT-90) nuclear magnetic resonance. Ultraviolet (UV), and Fourier-transform infrared (FTIR) spectroscopies as well as and high-resolution mass spectrometry (HRMS) were also adopted. Computational studies were conducted to foresee the interactions between compound

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11

Magtoof, Zainab Ryad, and Mahmood Shakir Magtoof. "Synthesis and Characterization of Some 4- Substituted Thiazolidinone Derivatives." INTERNATIONAL JOURNAL OF PHARMACEUTICAL QUALITY ASSURANCE 10, no. 04 (2019): 631–36. http://dx.doi.org/10.25258/ijpqa.10.4.12.

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This study is concerned with the synthesis and characterization of 4-thiazolidinone derivatives (3a-3e). These compounds were prepared by reacting mercaptoacetic acid with the appropriate Schiff bases (imines) by heating at 50-60 °C in chloroform with moderate yields (51- 75 %). The structures of these 4-thiazolidinone derivatives were established on the basis of spectral studies using IR, 1H-NMR, 13C-NMR, and13C-NMR DEPT .

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12

Micheletti, Gabriele, Natalia Calonghi, and Carla Boga. "Methyl 9-(2-Iminothiazol-3(2H)-yl)-9-oxononanoate." Molbank 2023, no. 1 (2023): M1580. http://dx.doi.org/10.3390/m1580.

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Methyl 9-(2-iminothiazol-3(2H)-yl)-9-oxononanoate was synthesized through Schotten–Baumann type reaction between 2–aminothiazole and methyl 9-chloro-9-oxononanoate. The structure of the newly synthesized compound was elucidated based on 1H-NMR, 13C-NMR, DEPT, NOE, ESI-MS, FT-IR and UV-Vis spectroscopy.

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13

Pham, H. L., B. T. Do, T. S. Pham, and D. G. Le. "Synthesis and Characterisation of Hydroxyl-terminated Liquid Natural Rubber by Photo-Fenton Reaction." ASEAN Journal on Science and Technology for Development 30, no. 1&2 (2017): 29–36. http://dx.doi.org/10.29037/ajstd.347.

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Hydroxyl-terminated liquid natural rubber (HTNR) was prepared by the photo-Fenton reaction, which was carried out in solution in the presence of H2O2/Fe(II) combined with UV irradiation. The HTNR obtained was characterized by GPC, FT-IR, 1H-NMR, 13C-NMR, DEPT-NMR spectroscopy as well as by chemical methods. A probable mechanism leading to the formation of HTNR was discussed based on the analytical data.

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14

Stoitsov, Dimitar, Marin Marinov, Plamen Penchev, and Neyko Stoyanov. "4-(8-Propyl-2,4-dithioxo-1,3-diazaspiro[4.5]decan-3-yl)spiro[1,5-dihydro-1,5-benzodiazepine-2,3′-indoline]-2′-one)." Molbank 2025, no. 2 (2025): M2011. https://doi.org/10.3390/m2011.

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A number of 1D and 2D NMR techniques, such as 1H, 13C, DEPT 135, 1H-1H COSY, HSQC, and HMBC, were utilized for the structure verification of 4-(8-propyl-2,4-dithioxo-1,3-diazaspiro[4.5]decan-3-yl)spiro[1,5-dihydro-1,5-benzodiazepine-2,3′-indoline]-2′-one). The NMR spectra provided evidence for the tautomeric conversion of the compound. The completely assigned NMR data was supported additionally by ATR.

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15

Kantamreddi, Venkata Siva Satyanarayana, and Colin W. Wright. "Complete NMR Assignments of Tubulosine." Natural Product Communications 7, no. 1 (2012): 1934578X1200700. http://dx.doi.org/10.1177/1934578x1200700108.

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This article reports the structural elucidation of the Alangium alkaloid, tubulosine (1) on the basis of systematic 2D-NMR analyses (DEPT, COSY, TOCSY, NOESY, ROESY, HMQC and HMBC). The data obtained allowed the unambiguous assignment of all proton and carbon signals in 1 for the first time.

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16

Al–Douh, Mohammed Hadi, Shafida Abd Hamid, and Hasnah Osman. "1D AND 2D NMR STUDIES OF BENZYL O–VANILLIN." Indonesian Journal of Chemistry 8, no. 3 (2010): 411–17. http://dx.doi.org/10.22146/ijc.21598.

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The reaction of o-vanillin A with benzyl bromide B2 in acetone as the solvent and K2CO3 as a base in the presence of tetra-n-butylammonium iodide (TBAI) as catalyst formed benzyl o-vanillin, C. The complete assignments of C using PROTON, APT, DEPT-135, COSY, NOESY, HMQC and HMBC NMR in both CDCl3 and acetone-d6 are discussed, and the coupling constants J are reported in Hertz (Hz). Keywords: 1H NMR; 13C NMR; 2D NMR; Benzyl o-Vanillin

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17

Fai, Leong Ka, Margrate Anyanwu, Jiang Ai, et al. "4-(4-(((1H-Benzo[d][1,2,3]triazol-1-yl)oxy)methyl)-1H-1,2,3-triazol-1-yl)-7-chloroquinoline." Molbank 2022, no. 3 (2022): M1404. http://dx.doi.org/10.3390/m1404.

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The 1,2,3-triazole ring system can be easily obtained by widely used copper-catalyzed click reaction of azides with alkynes. 1,2,3-triazole exhibits myriad of biological activities, including antibacterial antimalarial, and antiviral activities. We herein reported the synthesis of quinoline-based [1,2,3]-triazole hybrid derivative via Cu(I)-catalyzed click reaction of 4-azido-7-chloroquinoline with alkyne derivative of hydroxybenzotriazole (HOBt). The compound was fully characterized by proton nuclear magnetic resonance (1H-NMR), carbon-13 nuclear magnetic resonance (13C-NMR), correlated spect

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18

Kawahara, Seiichi, Jinta Ukawa, Junichiro Sakai, Yoshimasa Yamamoto, and Yoshinobu Isono. "High-Resolution Latex-State 13C-NMR Spectroscopy for Natural Rubber Vulcanizates." Rubber Chemistry and Technology 80, no. 5 (2007): 751–61. http://dx.doi.org/10.5254/1.3539414.

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Abstract Crosslinking junctions of natural rubber vulcanizates were characterized by high-resolution latex-state 13C-NMR spectroscopy. Vulcanized natural rubber latex was prepared by two methods: i.e., vulcanization of the rubber latex and cryogenic crushing of a rubber sheet vulcanized on a hot press. High-resolution latex-state 13C-NMR spectroscopy was attained even after vulcanization of the rubber latex, as is evident from no background in spectrum and narrow half width of signals independent of vulcanization time. Small signals at 44 ppm and 57 ppm in the aliphatic carbon region were assi

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19

Aksinenko, A. Yu, I. P. Kalashnikova, and V. B. Sokolov. "Carbamoylimines of Methyltrifluoropyruvate in the Diels-Alder’s Azareaction with Cyclopentadiene." Biomedical Chemistry: Research and Methods 1, no. 3 (2018): e00016. http://dx.doi.org/10.18097/bmcrm00016.

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Carbamoylimines of methyl trifluoropyruvate react with cyclopentadiene with to formation of trifluoromethyl-containing azabicyclo [2.2.1] heptenes and tetrahydrocyclopenta[e][1,3]oxazines. NMR experiments involving DEPT and 1H{19F} determined the structure of the synthesized heterocycles and assignment of the signals in NMR spectra and established the exo-position of the CF3-group in azabicyclo[2.2.1]heptenes.

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20

G.K., Gasimova, and Serkerov S.V. "Investigation Of The Coumarin Derivatives Of Aerial Parts Of Peucedanum ruthenicum." Journal of Life Sciences and Biomedicine 70, no. 1 (2015): 16–20. https://doi.org/10.5281/zenodo.8298747.

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Three coumarin derivatives: I) CısHiO4, mp. 108-109°C; II) CısHịO4, m.p. 109-110°C; III) CioHO3, m.p. 17-118°C have been isolated using chromatography of obtained compounds after extraction from the aerial parts of Peucedanum ruthenicum M.B., collected from Yasamal passage of Shamkir region of the Azerbaijan Republic. On the base of IR- and NMR- (H, *C, "C Dept 135, Dept 90) spectral data they have been identi- fied as isoimperatorin, peucedanin and ostrutin respectively.

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21

Saidi, Nurdin, Hiroshi Morita, Marc Litaudon, Mat Ropi Mukhtar, Khalijah Awang, and A. Hamid A. Hadi. "BENZYLISOQUINOLINE ALKALOIDS FROM BARK OF Cryptocarya rugulosa." Indonesian Journal of Chemistry 11, no. 1 (2011): 59–66. http://dx.doi.org/10.22146/ijc.21421.

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Seven known Benzylisoquinoline alkaloids, Papraline 1, (+)-norcinnamolaurine 2, (+)-codamine 3, (+)-6-methoxy-1-(3'-methoxybenzyl)-N-methyl-7-isoquinolinol 4, (+)-reticuline N-oxide 5, (+)-reticuline 6 and (-)-N-methylisococlaurine 7 were isolated from bark of Cryptocarya rugulosa. A combination of 1D-NMR (1H, 13C, DEPT, NOE), 2D-NMR (COSY, NOESY, HMQC, HMBC), MS (HRESI+, FAB+ and EI) spectroscopy used to elucidate the structure.

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22

Thanh Loan, Vũ Thị. "ISOLATION AND STRUCTURE ELUCIDATION OF THREE FLAVONOIDS FROM THE SEED OF ZIZIPHUS MAURITIANA LAM." Vietnam Journal of Science and Technology 54, no. 2C (2018): 409. http://dx.doi.org/10.15625/2525-2518/54/2c/11869.

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Three flavonoids, spinosin (1), 6′′′-feruloyl spinosin (2) and 6′′′-sinapoyl spinosin (3) wereisolated from EtOH extract of seed of Ziziphus mauritiana. Their structures were elucidated bythe analysis of their spectroscopic data (ESI-MS,1H-NMR,13C-NMR, DEPT, HSQC và HMBC)and compared with literatures. These compounds were isolated for the first time in Vietnamfrom the seed of Ziziphus mauritiana

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23

Ngũ Trường, Nhân, та Cường Nguyễn Manh. "Góp phần nghiên cứu về thành phần hóa học của cây Sưa đỏ (dalbergia tonkinesis) ở Tây Nguyên". SCIENTIFIC JOURNAL OF TAN TRAO UNIVERSITY 6, № 15 (2020): 17–20. http://dx.doi.org/10.51453/2354-1431/2020/348.

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Từ gỗ cây Sưa đỏ (Dalbergia tokinensis Prain) thu hái tại tỉnh Dak Lak. Sử dụng kết hợp các phương pháp sắc ký bản mỏng và sắc ký cột. Hợp chất có khung isoflavanone là sativanone được phân lập. Cấu trúc hóa học của hợp chất này được xác định bằng phổ cộng hường từ hạt nhân NMR (phổ 1H-NMR, 13C-; DEPT-NMR), đồng thời đối chiếu với các tài liệu tham khảo đã công bố.

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24

Li, Chuanjiang, Hui Wang, Manuel Juárez та Eric Dongliang Ruan. "Structural Characterization of Amadori Rearrangement Product of Glucosylated Nα-Acetyl-Lysine by Nuclear Magnetic Resonance Spectroscopy". International Journal of Spectroscopy 2014 (17 квітня 2014): 1–6. http://dx.doi.org/10.1155/2014/789356.

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Maillard reaction is a nonenzymatic reaction between reducing sugars and free amino acid moieties, which is known as one of the most important modifications in food science. It is essential to characterize the structure of Amadori rearrangement products (ARPs) formed in the early stage of Maillard reaction. In the present study, the Nα-acetyl-lysine-glucose model had been successfully set up to produce ARP, Nα-acetyl-lysine-glucose. After HPLC purification, ARP had been identified by ESI-MS with intense [M+H]+ ion at 351 m/z and the purity of ARP was confirmed to be over 90% by the relative in

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25

Voelter, Wolfgang, Ademir Farias Morel, and Muhammad Munawer Qureshi. "Studies on the Peptide Alkaloids of Discaria febrifuga." Zeitschrift für Naturforschung B 42, no. 4 (1987): 467–72. http://dx.doi.org/10.1515/znb-1987-0413.

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Abstract A new tryptophan-containing peptide alkaloid, “discarin-K”, has been isolated from Discaria febrifuga, a shrub growing in Brazil, Argentina and Uruguay. Its structure has been determined as 1 on the basis of spectral studies. Another peptide alkaloid, franganin, was also isolated from the same plant and its 1H NMR and 13C NMR have been studied using COSY-45, 2 D-J resolved and DEPT techniques.

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26

Elgamal, M. Hani A., Hesham S. M. Soliman, Helmut Duddeck, Bozhana Mikhova, and Martin Gartmann. "A Novel Triterpene Saponin from Gypsophila capillaris." Zeitschrift für Naturforschung B 50, no. 4 (1995): 563–67. http://dx.doi.org/10.1515/znb-1995-0415.

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A novel C-28 tetraglycoside of quillaic acid (1) has been isolated from Gypsophila capillaris. The structure was elucidated by 1 D NMR (NOE difference, DEPT, selective 13C{1H} INEPT), 2D NMR ( 1H,1H and 1H,13C COSY, 1H,1H,1H RELAY, ROESY and TOCSY) and other spectroscopic and chromatographic evidences. Conformational dynamics within the tetrasaccharide part were estimated from NOE responses and ROESY peaks.

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27

Jiang, Bin, Nan Xiao, Huili Liu, Zhiming Zhou, Xi-an Mao, and Maili Liu. "Optimized Quantitative DEPT and Quantitative POMMIE Experiments for13C NMR." Analytical Chemistry 80, no. 21 (2008): 8293–98. http://dx.doi.org/10.1021/ac8015455.

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28

Coxon, Bruce. "Two-dimensional DEPT JCH)-resolved 13C NMR spectrum editing." Journal of Magnetic Resonance (1969) 66, no. 2 (1986): 230–39. http://dx.doi.org/10.1016/0022-2364(86)90026-0.

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29

Alty, Lisa T. "Monoterpene Unknowns Identified Using IR, 1H-NMR, 13C-NMR, DEPT, COSY, and HETCOR." Journal of Chemical Education 82, no. 9 (2005): 1387. http://dx.doi.org/10.1021/ed082p1387.

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30

Hanoğlu, Azmi, Duygu Yiğit Hanoğlu, Nilay Demirel, Hasan Soliman Yusufoğlu, and İhsan Çalış. "Secondary Metabolites from Teucrium creticum L." Records of Natural Products 15, no. 6 (2021): 487–502. http://dx.doi.org/10.25135/rnp.232.20.12.1922.

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From the aerial parts of Teucrium creticum L. (Lamiaceae) eight compounds, 1 – 8 were isolated using chromatographical methods. Based on the results of spectroscopical analysis such as UV, 1D-NMR (1H-, 13C-NMR, DEPT-135), 2D-NMR (COSY, HSQC, HMBC, NOESY) and HRMS, the structure of the compounds were determined as two iridoids, 8-O-acetylharpagide (1) and teuhircoside (2), two phenylethanoid glycosides, verbascoside (= acteoside) (3) and lavandulifolioside (4), and four neoclerodane-type diterpenoids, teucrin H3 (= 19-acetylgnaphalin) (5), teucjaponin B (6), teucretol (7) and diacetylteumassili

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31

Saidi, Nurdin, A. Hamid A. Hadi, Khalijah Awang, and Mat Ropi Mukhtar. "APHORPINE ALKALOIDS FROM BARK OF Cryptocarya ferrea." Indonesian Journal of Chemistry 9, no. 3 (2010): 461–65. http://dx.doi.org/10.22146/ijc.21516.

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Isolation, identification and characterization of the compounds isolated from the bark of Cryptocarya ferrea yielded three known aphorpine alkaloids. They are (-)-O-methylisopiline 1, (+)-norlirioferine 2 and (+)-lirioferine 3. Structural elucidation was established through several spectroscopic methods, such as 1D-NMR (1H, 13C, DEPT, NOE), 2D-NMR (COSY, NOESY, HMQC, HMBC), UV, IR, and MS and comparison with the published data. Keywords: Cryptocarya ferrea; (-)-o-methylisopiline, (+)-norlirioferine, (+)-lirioferine

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32

Khaskel, Anamika, Pranjit Barman, Subir Kumar Maiti, and Utpal Jana. "Nebivolol nanoparticles: a first catalytic use in Biginelli and Biginelli-like reactions." Canadian Journal of Chemistry 96, no. 12 (2018): 1021–25. http://dx.doi.org/10.1139/cjc-2017-0621.

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Herein, we report the catalytic activity of nebivolol nanoparticles a novel organocatalyst for the synthesis of DHPMs and DHPM-5-carboxamides. The nanoparticles are confirmed by DSC, TEM, AFM, and IR spectroscopy. The catalyst can be readily recovered and reused for the next four runs without any significant impact on the yields of the products. The products are fully characterized by FTIR, 1H NMR, 13C NMR, and distortionless enhanced polarization transfer (DEPT) NMR. The methodology adopted here offers several advantages such as solvent-free reaction, low loading of catalyst, short reaction t

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33

Ahmed, Ahmed A., Noureddine Gherraf, Ashraf A. El-Bassuony, et al. "Guyonianin A and B, Two Polyester Diterpenes from Algerian Euphorbia guyoniana." Natural Product Communications 1, no. 4 (2006): 1934578X0600100. http://dx.doi.org/10.1177/1934578x0600100402.

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The dichloromethane extract of the aerial parts of Euphorbia guyoniana afforded two new polyester diterpenes, named guyonianin A and B, a rare class of bicyclic diterpenes. Their structures were established by high-field NMR spectroscopic methods, including DEPT, COSY, NOESY, HMQC and HMBC.

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34

Tulyabaeva, L. I., R. R. Salakhutdinov, A. R. Tulyabaev, T. V. Tyumkina, and M. F. Abdullin. "Cp2TiCl2-Catalyzed Interaction of Methylenecycloalkane with BF3·THF." Žurnal organičeskoj himii 60, no. 1 (2024): 75–85. https://doi.org/10.31857/s0514749224010065.

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The Cp2TiCl2-catalyzed interaction of methylenecycloalkanes with BF3·THF in tetrahydrofuran was carried out for the first time with the formation of target 1-fluoro-1-boraspirocarbocycles and also isomerization products of a starting monomer (1-methylcycloalk-1-enes). The structure of reaction products was elucidated using one- (1H, 13C Dept, 11B, 19F) and two-dimensional (COSY, HSQC, HMBC) NMR spectroscopy, mass spectrometry combined with quantum-chemical calculations of 13C NMR chemical shifts.

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35

Rahayu, Maya, Susi Kusumaningrum, and Hayun Hayun. "5-(6-Hydroxy-6-methyl-5-oxoheptan-2-yl)-2-methyl Phenyl Acetate." Molbank 2019, no. 1 (2018): M1041. http://dx.doi.org/10.3390/m1041.

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We synthesized a novel compound, 5-(6-hydroxy-6-methyl-5-oxoheptan-2-yl)-2-methylphenyl acetate, in a good yield by oxidation of 1-O-acetyl-xanthorrizol using potassium permanganate in acidic condition. The structure was elucidated by Fourier Transform Infrared (FTIR), 1H-Nuclear Magnetic Resonance (NMR) and 13C-NMR, two-dimensional (2D)-HSQC, Distortionless Enhancement by Polarization Transfer (DEPT), 2D-Heteronuclear Multiple Bond Correlation (HMBC), and High-Resolution Mass Spectra (HRMS) spectral data.

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36

Tulyabaeva, L. I., R. R. Salakhutdinov, A. R. Tulyabaev, T. V. Tyumkina, and M. F. Abdullin. "Interaction of Methylenecycloalkanes with BF3·THF Catalyzed by 2TiCl2." Журнал органической химии 59, no. 9 (2023): 1158–67. http://dx.doi.org/10.31857/s0514749223080069.

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The Cp2TiCl2-catalyzed interaction of methylenecycloalkanes with BF3·THF in tetrahydrofuran was carried out for the first time with the formation of target 1-fluoro-1-boraspirocarbocycles and also isomerization products of a starting monomer (1-methylcycloalk-1-enes). The structure of reaction products was elucidated using one(1H, 13C Dept, 11B, 19F) and two-dimensional (COSY, HSQC, HMBC) NMR spectroscopy, mass spectrometry combined with quantum-chemical calculations of 13C NMR chemical shifts.

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37

Yuliar, Yunazar Manjang, Syamsul A. Achmad, and Sanusi Ibrahim. "SENYAWA FENOLIK DARI KULIT BATANG Garcinia cf. cymosa DAN UJI AKTIFITAS ANTIOKSIDAN." Jurnal Riset Kimia 5, no. 1 (2015): 89. http://dx.doi.org/10.25077/jrk.v5i1.189.

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ABSTRACT A Phenolic compound was isolated from the bark of Garcinia cf. cymosa. Isolation methods were used are maseration, fractionation, and chromatography. Structure determination was done using spectroscopy methods including IR, H-NMR, C-NMR, DEPT, COSY, HMQC, and HMBC. The result showed that the isolated compound is (-)epicatechin. Antioxidant activity of isolated compound was determined by DPPH method. Isolated compound has antioxidant activity which has IC50 = 41,8 ppm. Keywords : Phenolic, (-)epicatechin, Garcinia cf. cymosa, DPPH

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38

Xu, Liang, Chun-Feng Tang, Cui Wu, Yu-Cui Ma, and Zhi-Mao Chao. "A New Noroleanane from the Seeds of Trichosanthes kirilowii." Natural Product Communications 13, no. 7 (2018): 1934578X1801300. http://dx.doi.org/10.1177/1934578x1801300707.

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A new noroleanane named as karounitriol (1), together with four known compounds, 7-oxodihydrokarounidiol (2), isokarounidiol (3), karounidiol (4), and stigmasta-7,22-dien-3β-ol were isolated from the seeds of Trichosanthes kirilowii Maxim. Structure of the new compound was elucidated as 3α,7β,29-trihydroxy-D:C-friedo-olean-8-ene on the basis of spectroscopic methods including extensive 1D NMR (1H, 13C), 2D NMR (1H-1H COSY, DEPT, HMQC, HMBC, and NOESY), IR, and MS studies.

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Pırıldar, Sevda, Çağlayan Ünsal-Gürer, Mine Koçyiğit, Josef Zapp, Alexandra K. Kiemer, and Ali H. Meriçli. "Norditerpenoid Alkaloids from Delphinium flexuosum Bieb." Zeitschrift für Naturforschung C 67, no. 11-12 (2012): 541–44. http://dx.doi.org/10.1515/znc-2012-11-1202.

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Delphiniflexine, a new norditerpenoid alkaloid, together with the three known norditerpenoid alkaloids methyllycaconitine, ajadine, and acoseptrigenine were isolated from the aerial parts of Delphinium flexuosum. The structure of delphiniflexine was established on the basis of 1H, 13C, DEPT, homonuclear 1H COSY, NOESY, HSQC, and HMBC NMR studies.

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40

Mehmood, Rashad, and Abdu Malik. "New Secondary Metabolites from Croton sparsiflorus." Zeitschrift für Naturforschung B 66, no. 8 (2011): 857–60. http://dx.doi.org/10.1515/znb-2011-0812.

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Sparsifol (1), a new stereoisomer of inositol, and proaporphine alkaloid crotsparsidine (2), have been isolated from the EtOH extract of Croton sparsiflorus. Their structures were determined on the basis of 1H and 13C NMR spectra, DEPT, COSY, NOESY, HMBC, HMQC, EI-MS, and FAB-MS experiments

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41

Mulia, Melindra. "ISOLASI KUMARIN DARI KULIT BUAH LIMAU SUNDAI (Citrus nobilis Lour)." EKSAKTA: Berkala Ilmiah Bidang MIPA 18, no. 02 (2017): 137–45. http://dx.doi.org/10.24036/eksakta/vol18-iss02/70.

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Coumarin has been isolated and characteritated from rind of Citrus nobilis Lour by maseration methode with methanol. After fractionation by n-hexane and ethyl acetate, collected the phase ethyl acetate which positive of coumarin. From ethyl acetate extract coumarin have been isolated by column chromatography. The isolation results was obtain 2,159 g of pure white needle-shape crystalline with the melting point of 126,2-127,60C. Structure of the isolated coumarine was elucidated by spectroscopic methodes, UV-Vis,13C-NMR, 1H-NMR, 2D-NMR (DEPT/HSQC, COSY, NOESY, HMBC) and IR spectra. Based on the

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42

Chen, Qiu Ling, Ke Wei Sun, and Chun Hong Zhang. "The Liquefaction Mechanism Research of Straw Fiber in Polyhydric Alcohol." Advanced Materials Research 518-523 (May 2012): 3546–51. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.3546.

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Two key products were isolated and purified from liquid mixture composition of wheat straw, by means of a combination of organic solvent extraction and column chromatography. Their structures were identified on basis of nuclear magnetic resonance (1H-NMR, 13C-NMR, DEPT), mass spectrometry (MS), and infrared (IR). The mechanism of liquefaction of straw was inferred from the structures of products and changes of hydroxyl value and liquefaction residue, which make up the lack of mechanistic studies of overall utilization of plant fibers.

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43

Uyên, Nguyễn Thị Tố, Trần Thị Thanh Phúc, Lương Văn Dũng та Trịnh Thị Điệp. "CÁC HỢP CHẤT PHYTOSTEROL, TRITERPEN, VÀ ALCOL MẠCH DÀI PHÂN LẬP TỪ LÁ TRÀ ĐÀ LẠT (Camellia dalatensis Luong, Tran & Hakoda)". Tạp chí Khoa học Đại học Đà Lạt 9, № 2 (2019): 70. http://dx.doi.org/10.37569/dalatuniversity.9.2.531(2019).

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Từ dịch chiết n-hexan và dichloromethan của lá Trà Mi Đà Lạt (Camellia dalatensis Luong, Tran, & Hakoda), bằng các phương pháp sắc ký kết hợp với các phương pháp phổ hiện đại (IR, 1H-NMR, 13C-NMR, DEPT, HSQC, HMBC, và ESI-MS) đã phân lập và nhận dạng được cấu trúc năm hợp chất là spinasterol, stigmasterol, acid oleanolic, docosan, và 1-tricosanol. Đây là lần đầu tiên các hợp chất này được phân lập từ loài C. dalatensis.

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44

Spitzer, Timothy, Andrea M. Sefler, and Randy Rutkowske. "An improved DEPT-HMQC sequence for high-throughput NMR analysis." Magnetic Resonance in Chemistry 39, no. 9 (2001): 539–43. http://dx.doi.org/10.1002/mrc.883.

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Mohamed, Abou El-Hamd H., Abeer M. Esmail, and Adila M. El-Saade. "Terpenes from Artemisia herba-alba." Zeitschrift für Naturforschung C 68, no. 9-10 (2013): 343–46. http://dx.doi.org/10.1515/znc-2013-9-1001.

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Chromatographic investigation of the methylene chloride/methanol extract of the aerial parts of Artemisia herba-alba afforded a new monoterpene dimer, in addition to a known monoterpene and three known sesquiterpene lactones. The structures of the compounds were determined by comprehensive NMR analyses, including DEPT, COSY, HMQC, HMBC, and HRMS

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46

Fuguan, Chjuo, Seesregdorj S, and Gerelt-Od Ya. "Five sesquiterpenes from the root Aucklandia lappa Decne." Bulletin of the Institute of Chemistry and Chemical Technology, Mongolian Academy of Sciences, no. 7 (December 25, 2019): 5–11. http://dx.doi.org/10.5564/bicct.v0i7.1266.

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The four sesquiterpenes calameone (1), dehydrocostus lactone (2), aristolone (3), alantolactone (4) and one triterpenoid α-amyrine (5), simple phenolic compounds such as 4-hydroxybenzaldehyde, (6), piceol (7), apocynin (8), dihydroconiferyl (9) and coniferyl (10) have been identified by using the proton and carbon NMR spectra which were isolated from a dichloromethane extract of the roots of Aucklandia lappa Decne. Their structures were established by the one‐and two‐dimensional NMR techniques including DEPT, COSY and HMBC spectroscopy. This work examined proton and carbon NMR data of calameon

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47

Hossain, M. Amzad, Atiqur Rahman, and Sun Chul Kang. "A NEW PRENYLATED FLAVANONE FROM THE ARIAL PART OF Orthosiphon stamineus." Indonesian Journal of Chemistry 8, no. 1 (2010): 101–3. http://dx.doi.org/10.22146/ijc.21661.

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Phytochemical investigations on the chloroform extract of the arial part of Orthosiphon stamineus resulted in isolation of one new prenylated compound 5,7-dimethoxy-3,4′-dihydroxy-3′,8-di-C-prenylflavanone together with four known flavonoids compounds, sinensetin, eupatorin, 5,6,7,4¢-tetramethoxyflavone and 3-hydroxy-5,6,7,4¢-tetramethoxyflavone. The structures were deduced on basis of different analytical methods such as UV, IR, 1H-NMR, 13C-NMR, DEPT, COSY, HMBQ and GC-MS. The prenylated compound is reported for the first time from this plant. Keywords: Orthosiphon stamineus, prenylated flava

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48

Mohammad, Faryal Vali, Mushtaq Noorwala, Viqar Uddin Ahmad, Aqib Zahoor, and HJ Nordin. "A New Monodesmosidic Triterpenoid Saponin from the Leaves of Pometia Pinnata." Natural Product Communications 7, no. 11 (2012): 1934578X1200701. http://dx.doi.org/10.1177/1934578x1200701105.

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Phytochemical investigation of the leaves of Pometia pinnata resulted in the isolation of a new triterpenoid saponin (1), together with a known compound, kaemferol 3- O-α-L-rhamnopyranoside (2). The structure of 1 was established as 3- O-[α-L-arabinofuranosyl-(1→4)–α-L-rhamnopyranosyl-(1→2)-α-L-arabinopyranosyl]-hederagenin. The structure elucidation of the isolated compounds was based primarily on 1D- and 2D-NMR techniques, including 1H and 13C NMR spectra, DEPT, and by 2D COSY, HMQC, HMBC and TOCSY experiments.

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49

Yuosra K. Alasadi, Farouq Emam Hawais, and Ahmed A. ALKazmi. "Synthesis and Characterization of Some New Pyrazoline Derivatives Containing Azo Group by One Pot Method." Tikrit Journal of Pure Science 23, no. 3 (2018): 67–74. http://dx.doi.org/10.25130/tjps.v23i3.502.

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This research includes the preparation of some of pyrazoline derivatives containing the azo group by one pot method through the treatment of the compound 2-hydroxy-5-(m-tolyldiazenyl) benzaldehyde with p-chlorob enzylchloride to give the compound(1) using the Williamson reaction. The compound (1) is treated with a series of ketones and with phenylhydrazine in the base medium to give new derivatives of pyrazoline (2-11). The synthesized compounds were characterized by elemental analyses and FT-IR, 1H-NMR, 13C-NMR, 13C-DEPT.

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Sunaryanto, Rofiq, Bambang Marwoto, Tun Tedja Irawadi, Zainal Alim Mas’ud, and Liesbetini Hartoto. "ANTIBIOTIC COMPOUND FROM MARINE ACTINOMYCETES (Streptomyces sp A11): ISOLATION AND STRUCTURE ELUCIDATON." Indonesian Journal of Chemistry 10, no. 2 (2010): 219–25. http://dx.doi.org/10.22146/ijc.21464.

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Purification and structure elucidation of antibiotic produced by marine actinomycetes (Streptomyces sp A11) was conducted. Production of antibiotic was carried out by liquid fermentation using yeast and peptone medium for 5 days fermentation. Purification of antibiotic was carried out by silica gel 60 (Merck, 0.063-0.200 mm) column chromatography and preparative HPLC. Structure elucidation was carried out using ESI-MS, 1H NMR, 13C NMR, DEPT 13C NMR, and FTIR. This antibiotic was identified as cyclo (tyrosyl-prolyl) / (C14H16N2O3). This antibiotic had biological activity to Escherichia coli ATC

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