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Journal articles on the topic 'And Chemical Moiety'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Khan, S. R., M. S. Lunge Lunge, and D. T. Tayade. "Studies in the Measurements of Refractive Index of Substituted Thio-Carbamidonapthols In 100% & 90% Binary Mixtures of 70% Etoh-H2O Mixture at 298.15 K." Asian Journal of Pharmaceutical Research and Development 12, no. 1 (2024): 15–18. http://dx.doi.org/10.22270/ajprd.v12i1.1346.

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After synthesis of any chemical moiety; physico-chemical properties of that chemical moiety must be investigated. These are essential for predications of medicinal, agricultural, industrial, biochemical and biological applications theoretically and refractometric measurement is one of the best method for the determination of the same in the drug chemistry. Refractometric measurements of chemical moiety are one of the important study for understanding the pharmacokinetics study of synthesized or isolated chemical moiety. Considering all these things refractrometic measurements of 4-amino-1-naph

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2

Sabatino, Andrea, and Diego Frezzato. "Tagged-moiety viewpoint of chemical reaction networks." Journal of Chemical Physics 150, no. 13 (2019): 134104. http://dx.doi.org/10.1063/1.5081675.

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3

Long, C. J., and T. W. Stone. "EDRF: a Ca2+ -dependent chemical moiety(ies)." Trends in Pharmacological Sciences 6 (January 1985): 285. http://dx.doi.org/10.1016/0165-6147(85)90131-2.

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4

Matsue, H., K. Takagaki, K. Honda, et al. "Chemical characterization of urinary glycopeptides." Clinical Chemistry 33, no. 12 (1987): 2214–19. http://dx.doi.org/10.1093/clinchem/33.12.2214.

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Abstract We prepared human urinary glycopeptides from the supernatant liquid remaining after precipitation of the nondialyzable fraction with cetylpyridinium chloride. Using cation exchange and affinity chromatographies and gel filtration, we obtained 28 glycopeptide subfractions. By compositional analyses of sugar and amino acid, and by reducing-terminal analyses after reduction with NaBH4, we determined the size of the carbohydrate moiety and the types of carbohydrate-peptide linkage involved. We isolated several glycopeptides not previously described: six with sialic acid, two with fucose,

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5

Hirata, F. "Structural transition induced by a local chemical/mechanical perturbation in biomolecules." Condensed Matter Physics 26, no. 4 (2023): 43803. http://dx.doi.org/10.5488/cmp.26.43803.

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Structural transition induced by a local conformational change in biomolecules is formulated based on the generalized Langevin theory for the structural fluctuation of a molecule in solution, and the linear response theory, derived by Kim and Hirata in 2012. A chemical/mechanical change introduced at a moiety of biomolecules, such as an amino acid substitution or a structural change of a chromophore by the photo-excitation, is considered as a perturbation, and the rest of the protein as the reference system. The linear-response equation consists of two parts: a mechanical/chemical perturbation

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6

Choi, Hyun Wook, Wei-Jia Chen, G. Stephen Kocheril, Dao-Fu Yuan, and Lai-Sheng Wang. "The Structures and Bonding of Bismuth-Doped Boron Clusters: BiB4− and BiB5−." Inorganics 11, no. 10 (2023): 405. http://dx.doi.org/10.3390/inorganics11100405.

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We present an investigation on the structures and chemical bonding of two Bi-doped boron clusters BiBn− (n = 4, 5) using photoelectron spectroscopy and theoretical calculations. The electron affinities of BiB4 and BiB5 are measured to be 2.22(2) eV and 2.61(2) eV, respectively. Well-resolved photoelectron spectra are obtained and used to compare with theoretical calculations to verify the structures of BiB4− and BiB5−. Both clusters adopt planar structures with the Bi atom bonded to the periphery of the planar Bn moiety. Chemical bonding analyses reveal that the Bn moiety maintains σ and π dou

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7

King, Russell R., and Roy Greenhalgh. "Chemical deoxygenation of the epoxide moiety in deoxynivalenol (vomitoxin)." Canadian Journal of Chemistry 63, no. 5 (1985): 1089–92. http://dx.doi.org/10.1139/v85-184.

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Reaction of triacetoxydeoxynivalenol (3) with hydrobromic acid–acetic acid at reflux temperatures yielded 3α,7α, 13,15-tetraacetoxy-2-bromo apotrichothec-9-en-8-one (5) and 3α,7α,15-triacetoxy-13-bromo-12-hydroxytrichothec-9-en-8-one (4). Dehalohydrination of the 13,12-bromohydrin derivative with Zn–acetic acid followed by deacetylation with sodium ethoxide gave 3α,7α,15-trihydroxytrichothec-9,12-dien-8-one (2). This compound proved identical to the transformation product isolated from incubation of deoxynivalenol (vomitoxin) in vitro with rumen microorganisms.

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8

Amrita, Verma*, Sharma Suman, and Chauhan Rajani. "RECENT CHEMICAL ADVANCEMENTS OF PYRAZOLE MOIETY IN ANTICANCER THERAPY." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 5, no. 4 (2016): 869–76. https://doi.org/10.5281/zenodo.50425.

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Pyrazole moiety is one of the main scaffold for many anticancer drug candidates.Many pyrazole derivatives have been synthesized which shows their activity against different leukemia cell line, non-small cell lung cancer, colon cancer, prostate cancer, CNS cancer, renal cancer, breast cancer, ovarian cancer and cervix cancer cell line. Literature survey revealed that they have been implemented as antitumor, antileukemic and antiproliferative agent beside their capability to inhibit different types of enzymes which plays important roles in cell division.

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9

Premathilake, Hemali D., and Alexei V. Demchenko. "2-Allylphenyl glycosides as complementary building blocks for oligosaccharide and glycoconjugate synthesis." Beilstein Journal of Organic Chemistry 8 (April 18, 2012): 597–605. http://dx.doi.org/10.3762/bjoc.8.66.

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The O-allylphenyl (AP) anomeric moiety was investigated as a new leaving group that can be activated for chemical glycosylation under a variety of conditions, through both direct and remote pathways. Differentiation between the two activation pathways was achieved in a mechanistic study. The orthogonal-type activation of the AP moiety along with common thioglycosides allows for the execution of efficient oligosaccharide assembly.

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10

Yulvianti, Meri, and Christian Zidorn. "Chemical Diversity of Plant Cyanogenic Glycosides: An Overview of Reported Natural Products." Molecules 26, no. 3 (2021): 719. http://dx.doi.org/10.3390/molecules26030719.

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Cyanogenic glycosides are an important and widespread class of plant natural products, which are however structurally less diverse than many other classes of natural products. So far, 112 naturally occurring cyanogenic glycosides have been described in the phytochemical literature. Currently, these unique compounds have been reported from more than 2500 plant species. Natural cyanogenic glycosides show variations regarding both the aglycone and the sugar part of the molecules. The predominant sugar moiety is glucose but many substitution patterns of this glucose moiety exist in nature. Regardi

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11

Snoch, Wojciech, Karolina Stępień, Justyna Prajsnar, Jakub Staroń, Maciej Szaleniec, and Maciej Guzik. "Influence of Chemical Modifications of Polyhydroxyalkanoate-Derived Fatty Acids on Their Antimicrobial Properties." Catalysts 9, no. 6 (2019): 510. http://dx.doi.org/10.3390/catal9060510.

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Sugar esters are bioactive compounds derived from renewable resources. They consist of a sugar moiety with attached non-polar part – usually a fatty acid. These compounds find uses in cosmetic, food and pharmaceutical industries as surfactants due to their physicochemical and antimicrobial activities. In this study we have produced fatty acids for sugar ester synthesis from bacterially derived polyesters, namely polyhydroxyalkanoates (PHAs). We have developed methodology to decorate PHA monomers with a fluorinated moiety. With aid of biocatalysis a series of glucose esters was created with unm

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12

Sharma, Aastha, Aakash Deep, Minakshi Gupta Marwaha, and Rakesh Kumar Marwaha. "Quinoxaline: A Chemical Moiety with Spectrum of Interesting Biological Activities." Mini-Reviews in Medicinal Chemistry 22, no. 6 (2022): 927–48. http://dx.doi.org/10.2174/1389557521666210927123831.

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Abstract: Quinoxaline (C8H6N2), commonly called 1,4-diazanaphthalene, 1,4-benzodiazine, or benzopyrazine, is a very potent nitrogenous heterocyclic moiety consisting of a benzene ring fused with the pyrazine ring. A number of different methods for the synthesis of quinoxaline derivatives have been reported in the literature, but the most effective method, commonly used for the synthesis of quinoxaline analogues involves the condensation of substituted o-phenylenediamines with 1, 2- dicarbonyl compounds in the presence of different catalyst(s). The presence of different types of catalysts and t

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13

Muskawar, Prashant Narayan, Parsuraman Karthikeyan, Sachin Arunrao Aswar, Pundlik Rambhau Bhagat, and Sellappan Senthil Kumar. "NHC–metal complexes based on benzimidazolium moiety for chemical transformation." Arabian Journal of Chemistry 9 (November 2016): S1765—S1778. http://dx.doi.org/10.1016/j.arabjc.2012.04.040.

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14

LARGE, D. G., and I. J. BRADSHAW. "ChemInform Abstract: Chemical Synthesis of the Peptide Moiety of Glycopeptides." ChemInform 29, no. 2 (2010): no. http://dx.doi.org/10.1002/chin.199802276.

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15

Lin, Ching Hsuan, Chun Kai Chien, Chien Han Chen, and Tzong Yuan Juang. "Photo-sensitive benzoxazine II: chalcone-containing benzoxazine and its photo and thermal-cured thermoset." RSC Advances 7, no. 60 (2017): 37844–51. http://dx.doi.org/10.1039/c7ra06967g.

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Chalcone-containing benzoxazine (BHP-a) was synthesized. Two procedures were applied to cure BHP-a, thermal curing of chalcone and oxazine moieties. Another one was photo curing the chalcone moiety, followed by thermal curing of the oxazine moiety.

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16

Kothavale, Shantaram, and Nagaiyan Sekar. "A new type of triphenylamine based coumarin–rhodamine hybrid compound: synthesis, photophysical properties, viscosity sensitivity and energy transfer." RSC Advances 6, no. 107 (2016): 105387–97. http://dx.doi.org/10.1039/c6ra24485h.

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A series of novel core modified triphenylamine coumarin–rhodamine systems (compounds MCMR, MCDR and DCMR) was designed and synthesized by incorporating a coumarin moiety on one and a rhodamine moiety on the other phenyl ring of the triphenylamine molecular skeleton.

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17

V, Sivasubramaniyan. "Differential GFR estimation of the double moiety kidneys by modified GATE’S formula." Clinical Medical Reviews and Reports 3, no. 3 (2021): 01–07. http://dx.doi.org/10.31579/2690-8794/061.

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Since the beginning of the twenty-one century, carbon based nanomaterial (CNTs) has been introduced in (pharmacy and medicine) in therapeutic for system of drug delivery. NTs have proved able to transport a wide range of molecules across membranes and into living cells; therefore, they have attracted great interest in biomedical applications such as advanced imaging, tissue regeneration, and drug or gene deliver. As it is known, carbon nanotubes exhibit various unique intrinsic chemical and physical properties and it has been intensive explored, in the last few years, for applications in biolo

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18

Elashal, Hader E., Yonnette E. Sim, and Monika Raj. "Serine promoted synthesis of peptide thioester-precursor on solid support for native chemical ligation." Chemical Science 8, no. 1 (2017): 117–23. http://dx.doi.org/10.1039/c6sc02162j.

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19

Yang, Inho, Jusung Lee, Jihye Lee та ін. "Scalalactams A–D, Scalarane Sesterterpenes with a γ-Lactam Moiety from a Korean Spongia Sp. Marine Sponge". Molecules 23, № 12 (2018): 3187. http://dx.doi.org/10.3390/molecules23123187.

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Intensive study on the chemical components of a Korean marine sponge, Spongia sp., has led to the isolation of four new scalarane sesterterpenes, scalalactams A–D (1–4). Their chemical structures were elucidated from the analysis of spectroscopic data including 1D-and 2D-NMR as well as MS data. Scalalactams A–D (1–4) possess a scalarane carbon skeleton with a rare structural feature of a γ-lactam moiety within the molecules. Scalalactams A and B (1 and 2) have an extended isopropanyl chain at the lactam ring, and scalalactams C and D (3 and 4) possess a phenethyl group at the lactam ring moiet

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20

Makota, Oksana, and Yuriy Trach. "The studies of complex formation of metal borides in the reaction system of epoxidation of 1-octene with tert-butyl hydroperoxide by IR spectroscopy." Chemistry & Chemical Technology 1, no. 3 (2007): 127–29. http://dx.doi.org/10.23939/chcht01.03.127.

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The complex formation of molybdenum and vanadium borides in the reaction system of 1-octene epoxidation with tert-butyl hydroperoxide by infrared spectroscopic analysis was studied. It was shown that 1-octene formed complex with metal moiety in a case of molybdenum boride and with boron moiety in a case of vanadium boride.

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21

Das, Biswanath, G. Satyalakshmi, Nisith Bhunia, K. Ravider Reddy, V. Saidi Reddy, and G. Mahender. "Chemical Transformations of Parthenin, a Natural Bioactive Sesquiterpenoid [1]." Natural Product Communications 4, no. 1 (2009): 1934578X0900400. http://dx.doi.org/10.1177/1934578x0900400104.

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Chemical modifications of parthenin, a naturally occurring bioactive sesquiterpenoid, were carried out in regio- and stereoselective manners using various inexpensive reagents to form different natural and unnatural analogues. Reactions including dehydration, reduction, alkylation, addition and hydroxylation have been studied. In some of the analogues, the α-methylene-γ-lactone moiety, which plays a vital role for bioactivity of parthenin, remained intact.

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22

Spirtovic-Halilovic, Selma, Mirsada Salihovic, Hurija Dzudzevic-Cancar, et al. "DFT study and microbiology of some coumarin-based compounds containing a chalcone moiety." Journal of the Serbian Chemical Society 79, no. 4 (2014): 435–43. http://dx.doi.org/10.2298/jsc130628077s.

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In the present investigation, a series of coumarin-based compounds containing a chalcone moiety were studied for their in vitro and in silico properties. DFT global chemical reactivity descriptors (chemical hardness, total energy, electronic chemical potential and electrophilicity) are calculated for four synthesized compounds and used to predict their relative stability and reactivity. The antibacterial activities of all compounds have been screened against Bacillus subtilis (ATCC No. 6633) and Bacillus cereus (ATCC No. 11778). Quantum-chemical calculations indicate that antibacterial activit

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23

Hernández-Melo, Denhy, and Jorge Tiburcio. "Coupled molecular motions driven by light or chemical inputs: spiropyran to merocyanine isomerisation followed by pseudorotaxane formation." Chemical Communications 51, no. 99 (2015): 17564–67. http://dx.doi.org/10.1039/c5cc07056b.

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24

Marin-Puga, Gustavo, Václav Horák та Paris Svornos. "Effect of the π-Electron Ring Current on the 1H NMR Spectra of 1,1'-Binaphthol Derivatives". Collection of Czechoslovak Chemical Communications 58, № 1 (1993): 77–81. http://dx.doi.org/10.1135/cccc19930077.

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High resolution 1H NMR spectra of two 1,1'-binaphthols (I, II), two 1,1'-binaphthalenediols (III, IV) and four 1,1'- binaphthalenediols acetates (IIIa - IVa) were obtained and analyzed. The effect of the ring current was evaluated by comparing the chemical shifts of the compounds, assigned through H-H COSY NMR experiments, to those of the corresponding monomers. All experimental chemicals shifts are in close agreement with the theoretical values obtained via the Bovey model for the ring current effect of a benzene moiety.

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25

Ravindranath, N., C. Ramesh, K. Hara Kishore, U. SN Murty, and Biswanath Das. "Clerodendrone, a Novel Hydroquinone Diterpenoid from Clerodendrum Indicum." Journal of Chemical Research 2003, no. 7 (2003): 440–41. http://dx.doi.org/10.3184/030823403103174452.

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Chemical investigation of Clerodendrum indicum has resulted in the isolation of clerodendrone, a new member of hydroquinone diterpenoids (which are rare in the investigated family, Verbenaceae). The compound was characterised from its spectral (1D and 2D NMR) data and chemical reactions and was found to contain an uncommon structural pattern with beta-methyl dihydrofuran moiety.

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26

TRIPATHY, DIVYA BAJPAI, and ANURADHA MISHRA. "MICROWAVE SYNTHESIS AND CHARACTERIZATION OF WASTE SOYBEAN OIL-BASED GEMINI IMIDAZOLINIUM SURFACTANTS WITH CARBONATE LINKAGE." Surface Review and Letters 24, no. 05 (2016): 1750062. http://dx.doi.org/10.1142/s0218625x17500627.

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Gemini surfactants are presently gaining attention due to their unusual self-assembling characteristics and incomparable interfacial activity. Current research work involves the cost-effective microwave (MW) synthesis of waste soybean oil-based gemini imidazolinium surfactants (GIS) having a carbonate linkage in its spacer moiety. Structural characterizations of the materials have been done using FT-IR, 1H-NMR and [Formula: see text]C-NMR. Using indigenous and natural material as base and MW as energy source for synthesizing the GIS with easily degradable chemical moiety make them to be labele

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27

Mutoh, Katsuya, Hiroki Arai, Yoichi Kobayashi, and Jiro Abe. "Photo-control of the thermal radical recombination reaction: photochromism of an azobenzene-bridged imidazole dimer." Pure and Applied Chemistry 87, no. 6 (2015): 511–23. http://dx.doi.org/10.1515/pac-2014-0910.

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AbstractAmong various kinds of photochromic compounds, bridged imidazole dimers have been known as fast photo-switch molecules. Bridged imidazole dimers have opened up various potential applications to photochromic lenses and real-time holographic displays. The optical properties of bridged imidazole dimers strongly depend on the bridging moiety to tether two imidazole rings. Therefore, the control of the bridging structure by introducing another photochromic moiety would increase the versatility of bridged imidazole dimers. In this study, we designed and synthesized a new type of the bridged

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28

Ramakrishnan, Ashok, Sumit S. Chourasiya, and Prasad V. Bharatam. "Azine or hydrazone? The dilemma in amidinohydrazones." RSC Advances 5, no. 69 (2015): 55938–47. http://dx.doi.org/10.1039/c5ra05574a.

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Amidinohydrazone, an important class of biologically active molecules, is generally represented as a hydrazone. This moiety prefers to exist in its azine tautomeric state and hence, influences the physical, chemical and receptor binding properties.

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29

Soltanizadeh, Nafiseh, and Mahdi Kadivar. "Role of Globin Moiety in the Chemical Structure of Curing Pigment." Journal of Agricultural and Food Chemistry 60, no. 18 (2012): 4718–24. http://dx.doi.org/10.1021/jf300023s.

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30

Zahra, Fatima Tuz, Aamer Saeed, Khansa Mumtaz, and Fernando Albericio. "Tropylium Ion, an Intriguing Moiety in Organic Chemistry." Molecules 28, no. 10 (2023): 4095. http://dx.doi.org/10.3390/molecules28104095.

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The tropylium ion is a non-benzenoid aromatic species that works as a catalyst. This chemical entity brings about a large number of organic transformations, such as hydroboration reactions, ring contraction, the trapping of enolates, oxidative functionalization, metathesis, insertion, acetalization, and trans-acetalization reactions. The tropylium ion also functions as a coupling reagent in synthetic reactions. This cation’s versatility can be seen in its role in the synthesis of macrocyclic compounds and cage structures. Bearing a charge, the tropylium ion is more prone to nucleophilic/electr

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31

Ivleva, E. A., N. S. Orlinsky, M. S. Zaborskaya, and Yu N. Klimochkin. "Synthesis and chemical transformations of 1-aryladamantanes." Журнал органической химии 59, no. 11 (2023): 1465–81. http://dx.doi.org/10.31857/s0514749223110083.

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The synthesis was carried out and the transformations of 1-aryladamantanes in fuming nitric acid were studied. The reactions include nitroxylation of saturated cage and nitration of the aromatic moiety and lead to 3-(dinitroaryl)-1-adamantylnitrates. A number of new polyfunctional compounds have been synthesized based on reactions of substituted 3-(dinitroaryl)-1-adamantyl nitrates with nucleophiles in concentrated sulfuric acid. Due to the multifunctionality, the obtained compounds can be used as starting materials in the synthesis of substances with a wide spectrum of biological activity and

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32

Serra, Stefano. "A General Strategy for the Stereoselective Synthesis of the Furanosesquiterpenes Structurally Related to Pallescensins 1–2." Marine Drugs 17, no. 4 (2019): 245. http://dx.doi.org/10.3390/md17040245.

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Here, we describe a general stereoselective synthesis of the marine furanosesquiterpenes structurally related to pallescensins 1–2. The stereoisomeric forms of the pallescensin 1, pallescensin 2, and dihydropallescensin 2 were obtained in high chemical and isomeric purity, whereas isomicrocionin-3 was synthesized for the first time. The sesquiterpene framework was built up by means of the coupling of the C10 cyclogeranyl moiety with the C5 3-(methylene)furan moiety. The key steps of our synthetic procedure are the stereoselective synthesis of four cyclogeraniol isomers, their conversion into t

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33

Anderson, Grace I., Patrick C. Hillesheim, and Arsalan Mirjafari. "Ionic Liquids Containing the Sulfonyl Fluoride Moiety: Integrating Chemical Biology with Materials Design." ECS Meeting Abstracts MA2022-02, no. 55 (2022): 2093. http://dx.doi.org/10.1149/ma2022-02552093mtgabs.

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Research involving functionalized ionic liquids has become quite wide speared. They can serve as powerful tools to improve society, with a wide range of applications in medicine, science, and technology. As a SuFExable functionality, the sulfonyl fluoride has become widely adopted throughout the field of chemical biology due to its unique stability─reactivity pattern, highlighting the underappreciated potential of the S(VI)--F motif in ionic liquid design. For the first time, we have developed a new series of task-specific ionic liquids containing the sulfonyl fluoride motif -- a thermally sta

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34

Atta, Ayman M., Ayman El-Faham, Hamad A. Al-Lohedan, and Abdelrahman O. Ezzat. "Modified Epoxy with Chitosan Triazine Dihydrazide Derivatives for Mechanical and Corrosion Protection of Steel." Coatings 10, no. 12 (2020): 1256. http://dx.doi.org/10.3390/coatings10121256.

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Modification of the curing exothermic reaction of epoxy resin with polyamine (PA) hardeners by new chemically bonded fillers to improve the mechanical properties and anticorrosion performances of the epoxy coatings is the main goal for wide applications of epoxy coatings. In this work, the chemical structure of chitosan was modified with triazine hydrazide moiety that contains primary, secondary, and tertiary amine groups to act as activator and dangling chain linkers during the curing of epoxy/PA system. Different molecular masses of chitosan were modified with triazine dihydrazide moiety (Ch

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35

Okamoto, Yasuko, Yumi Nakadozono, Kosuzu Shiojiri, et al. "Diversity of Furanoeremophilane Composition in Ligularia tongolensis." Natural Product Communications 14, no. 10 (2019): 1934578X1987893. http://dx.doi.org/10.1177/1934578x19878937.

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The composition of root chemicals was studied for 7 samples of Ligularia tongolensis collected in Yunnan and Sichuan Provinces of China. The structures of 2 new 3β-angeloyloxy-6β-acyloxyfuranoeremophilan-15-oic acids were determined. It was found that the plant harbors chemical diversity in the acyloxy groups in 3,6-bis(acyloxy)eremophilan-15-oic acids. The presence of a 3-methylpentanoate moiety at C-3 appears geographically differentiated to a degree. Consistent with this low diversity, results of DNA analysis indicated little genetic differentiation, although introgression was inferred for

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36

Kathrotiya, Haresh G., and Yogesh T. Naliapara. "Synthesis of some New Quinoxalines Bearing Pyridinyl Thiazole Moiety." International Letters of Chemistry, Physics and Astronomy 52 (June 2015): 74–83. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.52.74.

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Keeping the objective to build up a new structural class of quinoxaline, a new series of quinoxaline derivatives bearing the pyridinyl thiazole nucleus have been synthesized by base-catalyzed chloro-amine condensation reaction approach. The protocol offers expeditious and easy synthesis with excellent yield. The chemical structures of the synthesized compounds were elucidated by 1H NMR, 13C NMR, FT-IR, elemental analysis, and mass spectral data.

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37

Kathrotiya, Haresh G., and Yogesh T. Naliapara. "Synthesis of some New Quinoxalines Bearing Pyridinyl Thiazole Moiety." International Letters of Chemistry, Physics and Astronomy 52 (June 2, 2015): 74–83. http://dx.doi.org/10.56431/p-6a7g5l.

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Keeping the objective to build up a new structural class of quinoxaline, a new series of quinoxaline derivatives bearing the pyridinyl thiazole nucleus have been synthesized by base-catalyzed chloro-amine condensation reaction approach. The protocol offers expeditious and easy synthesis with excellent yield. The chemical structures of the synthesized compounds were elucidated by 1H NMR, 13C NMR, FT-IR, elemental analysis, and mass spectral data.

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38

Hermecz, István, Andrea Sánta-Csutor, Csaba Gönczi, et al. "Chemical development of the vasopressin receptor 2 antagonist SR-121463." Pure and Applied Chemistry 73, no. 9 (2001): 1401–9. http://dx.doi.org/10.1351/pac200173091401.

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A facile convergent total synthesis of the selective, potent, and orally active V2 non-peptide antagonist, SR-121463, was developed by modification of the discovery route. One of the late intermediates, the sulfonyl chloride 1, was synthesized from 3-hydroxybenzoic acid (19) by regioselective sulfonation, O-methylation and amidation in four steps. Another late intermediate, indolin-2-one 2, was prepared from p-phenetidine (8) through the indolin-2-one 16, where the cyclohexanone moiety of 27 was introduced into the active 3-methylene group of 16 by sequential transformation using methyl acryla

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39

Pioli, Marianna, Nicolò Orsoni, Mirco Scaccaglia, et al. "A New Photoactivatable Ruthenium(II) Complex with an Asymmetric Bis-Thiocarbohydrazone: Chemical and Biological Investigations." Molecules 26, no. 4 (2021): 939. http://dx.doi.org/10.3390/molecules26040939.

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The synthesis, photoactivation and biological activity of a new piano-stool Ru(II) complex is herein reported. The peculiarity of this complex is that its monodentate ligand which undergoes the photodissociation is an asymmetric bis-thiocarbohydrazone ligand that possesses a pyridine moiety binding to Ru(II) and the other moiety contains a quinoline that endows the ligand with the capacity of chelating other metal ions. In this way, upon dissociation, the ligand can be released in the form of a metal complex. In this article, the double ability of this new Ru(II) complex to photorelease the li

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40

Geiger, Hans, Tassilo Seeger, Hannelore Hahn, Hans Dietmar Zinsmeister, Kenneth R. Markham, and Herbert Wong. "1HNMR Assignments in Biflavonoid Spectra by Proton-Detected C-H Correlation." Zeitschrift für Naturforschung C 48, no. 11-12 (1993): 821–26. http://dx.doi.org/10.1515/znc-1993-11-1201.

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Abstract The 1H and 13CNMR spectra of some representative biflavonoids have been reinvestigated by proton-detected C-H correlation. Some assignments made in earlier publications are revised. Rules for the influence of one flavonoid moiety upon the chemical shift of the other’s protons are given.

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41

Kurnia, Kiki Adi, Pranesh Matheswaran, Choo Jia How, Mohd Hilmi Noh, and Yuly Kusumawati. "A comprehensive study on the impact of chemical structures of ionic liquids on the solubility of ethane." New Journal of Chemistry 44, no. 26 (2020): 11155–63. http://dx.doi.org/10.1039/d0nj02221g.

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The solubility of ethane is not only governed by the electrostatic–misfit of the solute toward ionic liquids, but also the existence of a preferential site for ethane to interact with the ionic liquid's non-polar moiety.

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42

Spiegel, Maciej, Tadeusz Andruniów, and Zbigniew Sroka. "Flavones’ and Flavonols’ Antiradical Structure–Activity Relationship—A Quantum Chemical Study." Antioxidants 9, no. 6 (2020): 461. http://dx.doi.org/10.3390/antiox9060461.

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Flavonoids are known for their antiradical capacity, and this ability is strongly structure-dependent. In this research, the activity of flavones and flavonols in a water solvent was studied with the density functional theory methods. These included examination of flavonoids’ molecular and radical structures with natural bonding orbitals analysis, spin density analysis and frontier molecular orbitals theory. Calculations of determinants were performed: specific, for the three possible mechanisms of action—hydrogen atom transfer (HAT), electron transfer–proton transfer (ETPT) and sequential pro

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43

Uetake, Naohito. "Chemical state detection of dibutyl phosphate using 31P NMR chemical shift change." Canadian Journal of Chemistry 69, no. 2 (1991): 322–26. http://dx.doi.org/10.1139/v91-049.

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Chemical shift changes of 31P NMR were investigated for dibutyl phosphate (DBP) in several polar solvents and compared with tributyl phosphate (TBP). The chemical shift differences between DBP and TBP in the same solvents were found to reflect only the intermolecular interaction on P—OH in DBP, a moiety that is not present in TBP. Acid dissociation constants, Ka, in several polar solvents were determined using such chemical shift differences of DBP. The Ka determined in pure water is in good agreement with the literature value. The intermolecular interaction between alkaline ions and DBP was a

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Abbas, Ashraf A., and Kamal M. Dawood. "Anticancer therapeutic potential of benzofuran scaffolds." RSC Advances 13, no. 16 (2023): 11096–120. http://dx.doi.org/10.1039/d3ra01383a.

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Liu, Chengwei, and Michal Szostak. "Decarbonylative Sonogashira cross-coupling: a fruitful marriage of alkynes with carboxylic acid electrophiles." Organic Chemistry Frontiers 9, no. 1 (2022): 216–22. http://dx.doi.org/10.1039/d1qo01539g.

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The Sonogashira cross-coupling is one of the most fundamental C–C bond-forming reactions, wherein the strategic value of an alkyne moiety has found widespread applications at the frontiers of organic chemistry, materials science and drug discovery as the cornerstone building block of chemical synthesis.

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Layne, Tanya H., Stewart McLean, William F. Reynolds, and Winston F. Tinto. "Excelsinidine, A Quaternary Alkaloid from Aspidosperma excelsum." Natural Product Communications 2, no. 6 (2007): 1934578X0700200. http://dx.doi.org/10.1177/1934578x0700200606.

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A chemical investigation of Aspidosperma excelsum yielded excelsinidine (1), a quaternary indole alkaloid possessing an unusual 1-azoniatricyclo[4.3.3.0]undecane moiety, along with the known compound aspidodasycarpine (2). Structural elucidation was effected by a combination of 1D- and 2D-NMR spectroscopic techniques, along with mass spectral studies.

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Osada, Hiroyuki, and Toshihiko Nogawa. "Systematic isolation of microbial metabolites for natural products depository (NPDepo)." Pure and Applied Chemistry 84, no. 6 (2011): 1407–20. http://dx.doi.org/10.1351/pac-con-11-08-11.

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A microbial fraction library has been constructed as a part of RIKEN Natural Products Depository (NPDepo) to discover and isolate novel metabolites with unique biological activity from microbial sources efficiently and rapidly. The fraction library was made by a systematic separation method based on basic chromatographic techniques. Each fraction in the library was analyzed by liquid chromatography/mass spectrometry (LC/MS) to reveal physicochemical properties of each metabolite within the fraction, and the results were applied to construct a database for rapid discovery of novel and structura

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Fan, Dong, Shaohua Lu, Yundong Guo, and Xiaojun Hu. "Two-dimensional stoichiometric boron carbides with unexpected chemical bonding and promising electronic properties." Journal of Materials Chemistry C 6, no. 7 (2018): 1651–58. http://dx.doi.org/10.1039/c7tc04505k.

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We identify two B–C bonding patterns: pyramidal-geometry tetra-coordinated and hexa-coordinated sp<sup>2</sup>carbon moiety; B<sub>4</sub>C<sub>3</sub>has an ultrahigh Young's modulus that can even outperform graphene; the B<sub>2</sub>C sheet is metallic with a relatively high superconducting transition temperature (T<sub>c</sub>≈ 21.20 K).

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Takagi, Akuto, and Tadashi Mizutani. "Control of the molecular packing of chloroboron(iii) and fluoroboron(iii) subnaphthalocyanines by designing peripheral substituents." RSC Advances 7, no. 85 (2017): 54235–45. http://dx.doi.org/10.1039/c7ra11104e.

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Yuan, Ming, Feng Wang, and Yu-Kui Tian. "Metallo-supramolecular polymers derived from benzothiadiazole-based platinum acetylide complexes for fluorescent security application." RSC Advances 8, no. 71 (2018): 40794–97. http://dx.doi.org/10.1039/c8ra08615j.

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