Academic literature on the topic 'Carboxaldehyd'

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Journal articles on the topic "Carboxaldehyd"

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Chandrakanta, Bandyopadhyay, Pratim Nag Partha, Ranabir Sur Kumar, et al. "Biginelli reaction on 4-oxo-4H-1-benzopyran-3-carboxaldehyde- a search for reaction pathway." Journal of Indian Chemical Society Vol. 81, Feb 2004 (2004): 132–36. https://doi.org/10.5281/zenodo.5830113.

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Department of Chemistry, R. K. Mission Vivekananda Centenary College, Rahara, Kolkata-700 118, India <em>E-mail:</em> kantachandra@rediffmail.com <em>Manuscript recevied 31 January 2003, revised 6 May 2003. accepted 22 August 2003</em> On heating a mixture of 3-formylchromone 1, active methylene compound 2 or 3 and urea (4) in AcOH produces dihydropyrimidinones 10 or 11, whereas use of thiourea in place of urea produces 1,3-thiazine derivative 14 or 15 and the above reactions pass through the Knoevenagel condensate 5 or 6.
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Kemp, Chesley A., Donna K. McCullough, Dobrusia Bialonska, and Paul J. T. Johnson. "Effect of Bromination on the Quorum Sensing-Inhibiting Properties of Indole-3-Carboxaldehydes in Chromobacterium violaceum AHL System." Microbiology Research 12, no. 2 (2021): 376–82. http://dx.doi.org/10.3390/microbiolres12020025.

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Quorum sensing (QS) is a form of bacterial communication involved in the production of virulence factors in many species. As a result, inhibition of quorum sensing may be of use in mitigating pathogenesis. The signaling molecule indole is currently being investigated as a target for quorum sensing inhibition (QSI) and the indole derivative indole-3-carboxaldehyde (ICA) has been shown to inhibit quorum sensing-mediated behaviors in Escherichia coli. In this study, we investigate bromination as a method of increasing the QSI capabilities of indole carboxaldehydes. The IC50 values of three monobr
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Brewer, Greg, Cynthia Brewer, Raymond J. Butcher, and Peter Zavalij. "Formation of Ketimines from Aldimines in Schiff Base Condensation of Amino Acids and Imidazole-2-Carboxaldehydes: Tautomerization of Schiff Bases of Amino Acids Resulting in the Loss of Stereogenic Center." Inorganics 11, no. 10 (2023): 381. http://dx.doi.org/10.3390/inorganics11100381.

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The Schiff base reaction of imidazole-2-carboxaldehydes with the anion of alanine, leucine and phenylalanine in the presence of nickel(II) ion gives the neutral NiL2 complexes. The Schiff base ligand, L, binds through an imidazole nitrogen, NIm, the amino acid nitrogen, NAA, and a carboxylate oxygen, O, atom. The two N2O ligands bind to the nickel(II) in a meridional fashion with the NIm and O of each ligand in trans positions. These ligands can exist as the anticipated aldimine, Im − CH = NAA − CH(R) − CO2−, or the ketimine, Im − CH2NAA = C(R) − CO2−, tautomer. Tautomerization of the initiall
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Dvořák, Dalimil, David Šaman, Zdeněk Arnold, Ivana Císařová, and Václav Petříček. "Cycloaddition Reactions of Arylmethylenemalonaldehydes with Olefins." Collection of Czechoslovak Chemical Communications 57, no. 11 (1992): 2337–58. http://dx.doi.org/10.1135/cccc19922337.

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A series of 2,4-disubstituted 3,4-dihydro-2H-pyran-5-carboxaldehydes II-XIX was prepared by reaction of substituted arylmethylenemalonaldehydes I with 2-methylpropane, 1,1-diphenylethylene, styrene, ethyl vinyl ether, 1,1-dimethoxyethylene and 1,1-bis(methylthio)ethylene. In the case of the reaction with ethyl vinyl ether the dependence of the ratio of the arising cis- and trans- 2-ethoxy-4-aryl-3,4-dihydropyran-5-carboxaldehydes VII-XIV on the substitutent on the aromatic nucleus was studied. Information on the mechanism of this reaction was obtained and conformational equilibria of 2-ethoxy-
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GaOpen Chemistry 3, no. 4 (2005): 622–46. http://dx.doi.org/10.2478/bf02475192.

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AbstractThe reactions of substituted furo[3,2-b]pyrrole-5-carboxhydrazides 1 with 5-arylfuran-2-carboxaldehydes 2, 4,5-disubstituted furan-2-carboxaldehydes 3 and thiophene-2-carboxaldehyde 4 has been studied. The advantage of microwave irradiation on some of these reactions was reflected in the reduced reaction time and increased yields. Reactions of 1 with 4-substituted 1,3-oxazol-5(4H)-ones 11 led to diacylhydrazines 13 or to imidazole derivatives 14 depending on the temperature. 1,2,4-Triazole-3-thione 17 was synthesized by two-step reaction of 1 with phenylisothiocyanate and subsequent ba
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Gašparová, Renáta, Martin Moncman, and Branislav Horváth. "Microwave assisted reactions of 2-[3-(Trifluoromethyl)phenyl]-4-R1-furo[3,2-b] pyrrole-5-carboxhydrazides." Open Chemistry 6, no. 2 (2008): 180–87. http://dx.doi.org/10.2478/s11532-008-0009-4.

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AbstractThe effect of microwave irradiation on the reactions of 2-[3-(trifluoromethyl)phenyl]-4-R1-furo[3,2-b]pyrrole-5-carboxhydrazides 1 with 5-arylfuran-2-carboxaldehydes 2, thiophene-2-carboxaldehyde (3) and methyl 2-formylfuro[3,2-b]pyrrole-5-carboxylates 4 has been studied. Reactions of 1 with formic and acetic acid, respectively, led to acylhydrazides 9a–c. Reaction of 1a with 4-substituted 1,3-oxazol-5(4H)-one 10 led to imidazole derivative 13. 1,2,4-Triazole-3-thiones 15a,b were synthesized by two-step reaction of 1a with potassium isothiocyanate and phenyl isothiocyanate, respectivel
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SAMIA, R. EL-EZBAWY, and A. ALSHAIKH MONIRA. "Synthesis and Antibacterial Activity of New Diaryisulphicles containing Quinolyl, Pyrryl, 4-Thiazolidinone and/or Azetidin-2-one Moieties." Journal of Indian Chemical Society Vol. 67, May 1990 (1990): 398–400. https://doi.org/10.5281/zenodo.6163557.

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Chemistry Department, Faculty of Science, Assiut University, Assiut, Egypt Chemistry Department, Girls College of Education, Jeddah, Saudi Arabia <em>Manuscript received 3 August 1989, accepted 1 January 1990</em> Condensation of quinoline-4-carboxaldehyde and/or pyrrole-2-carboxaldebyde with 4-a minodiaryl sulphides (1) gave 4-[<em>N</em>-(&rho;-(diarylthio] formimidoyliquinolines (2) and 2-[<em>N</em>-(&rho;-(diarylthio)]formimidoyl]pyrroles (3) in good yields. Cyclocondensation of mercaptoacetic acid with azometbines yielded 3-[&rho;-(diarylthio]-244-quinoly1)-4- thiazolidinone (4) and 3-[&
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Berthiaume, Sylvie L., Brian L. Bray, Petr Hess, et al. "Synthesis of 5-substituted pyrrole-2-carboxaldehydes. Part I. Generation of formal 5-lithiopyrrole-2-carboxaldehyde equivalents by bromine–lithium exchange of 2-bromo-6-(diisopropylamino)-1-azafulvene derivatives." Canadian Journal of Chemistry 73, no. 5 (1995): 675–84. http://dx.doi.org/10.1139/v95-086.

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The first known lithiated 1-azafulvene derivatives, e.g., 8 and 13a, were generated by a low-temperature bromine–lithium exchange procedure with tert-butyllithium. These lithio species show substantial stability at ≤ −90 °C because, at these temperatures, the sterically demanding 6-diisopropylamino moiety, unlike the dimethylamino group, completely inhibits nucleophilic addition to C-6. At higher temperatures, the addition of tert-butyllithium to C-6 is significant and it can become the dominant process. The lithio species 8 is a useful formal equivalent of 5-lithiopyrrole-2-carboxaldehyde sin
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Halawa, Ahmed H., Ahmed H. Bedair, Ahmed M. El-Agrody, et al. "Synthesis and biological activities of new bis-indole derivatives via microwave irradiation." Zeitschrift für Naturforschung B 72, no. 9 (2017): 639–46. http://dx.doi.org/10.1515/znb-2017-0039.

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AbstractThree new series of bis-indole derivatives were synthesized based onp-phenylenediamine (2–4, 5and6) and 4,4′-ethylenedianiline moieties (7–9) using facile and efficient condensation of three positional isomeric indole-carboxaldehyde derivatives (1a–c) with bifunctional amines upon microwave irradiation. The symmetric dimeric indole derivatives2–4as well as non-symmetric analogues5and6were obtained byin situcondensation of the respective positional 3-, 2- and 5-isomeric indole-carboxaldehydes withp-phenylenediamine, while compounds7–9resulted from respective condensation based on 4,4′-e
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Teimuri-mofrad, Reza, and Fatemeh Abrishami. "An efficient synthesis of carboxaldehyde derivatives of 4H-pyran-4-one." Canadian Journal of Chemistry 85, no. 5 (2007): 352–57. http://dx.doi.org/10.1139/v07-034.

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We developed a general method for the synthesis of various 2-mono- and 2,6-di-carboxaldehyde substituted derivatives of 3,5-diphenyl-4H-pyran-4-one and 4H-pyran-4-one. 3,5-Diphenyl-6-methyl-4-oxo-4H-pyran-2-carboxaldehyde (4a), 6-methyl-4-oxo-4H-pyran-2-carboxaldehyde (4b), 3,5-diphenyl-4-oxo-4H-pyran-2,6-dicarboxaldehyde (5a), 4-oxo-4H-pyran-2,6-dicarboxaldehyde (5b), 3,5-diphenyl-6-hydroxymethyl-4-oxo-4H-pyran-2-carboxaldehyde (10a), and 6-hydroxymethyl-4-oxo-4H-pyran-2-carboxaldehyde (10b) were obtained from the corresponding di-, tri-, and tetra-bromo derivatives of 2,6-dimethyl-3,5-diphen
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Dissertations / Theses on the topic "Carboxaldehyd"

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Rigal, Luc. "Matière végétale et chimie fine synthèse de l'hydroxyméthyl-5 furanne carboxaldehyde-2 /." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb376093847.

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Fasolini, Andrea. "Supporting Cubane’s Renaissance: Metathesis reactions on 4-iodo-1-vinylcubane and Stetter reaction on 1-iodocubane-4-carboxaldehyde." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/11952/.

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Cubane is a peculiar cube-shaped alkane molecule with a rigid, regular structure. This makes it a good scaffold, i.e. a molecular platform to which the substituents are arranged in a specific and fixed orientation. Moreover, cubane has a body diagonal of 2.72 Å, very similar to the distance across the benzene ring, i.e. 2.79 Å. Thus, it would be possible to use cubane as a scaffold in medicinal and material chemistry as a benzene isostere 1,2. This could lead to advantages in terms of solubility and toxicity and could provide novel properties. For this purpose, the possibility of performing “m
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Hung, Wen-Shyan, and 洪文賢. "Ironcarbonyl,Palladium(II) and Silver(I) complexes of Thiophene-2-carboxaldehyde thiosemicarbazone." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/23504453900459405922.

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Lo, mei ting, and 羅美婷. "Apoptosis induced by 1-benzyl carbazole-4-carboxaldehyde derivatives in human leukemia cell lines." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/90007866802222515218.

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碩士<br>中國醫藥學院<br>藥物化學研究所<br>89<br>Abstract Synthesized 1-benzyl carbazole-4-carboxaldehyde derivatives ( LCY ) examined for their growth inhibition effects in human leukemia cell lines. HL60, U937, and K562 cells were treated with these compounds for 24 hours and their proliferation was determined by the propidium iodide DNA staining method. A dose-dependent decrease in the cell proliferation rate was observed for all compounds. LCY-12 had the highest growth inhibitory, and its IC50 were 2.58, 0.77, and 19.49 μM for HL60, U937, and K562 cells, respectively. DAPI-stained cells revea
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Saleem, Ayaan, Paulina A. Kobielska, K. Harms, et al. "Transition metal complexes of a versatile polyalkoxy oxazolidine-based ligand derived from in situ cyclization." 2018. http://hdl.handle.net/10454/15760.

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Yes<br>One-pot reaction between 8-hydroxyquinoline-2-carboxaldehyde (HQC) and tris(hydroxymethyl)aminomethane (TRIS) followed by in situ cyclization yielded an oxazolidine based ligand which produced four mononuclear complexes of MnII(1), CoII(2), NiII(3), ZnII(4), a tetranuclear iron (FeIII4) complex (5) and a trinuclear cobalt (CoIICoIII2) complex (6). Magnetic studies show dominant antiferromagnetic interaction in tetranuclear iron (FeIII4) complex 5 and presence of the slow relaxation of magnetisation in 6. The compounds were also studied for their antibacterial properties. The oxazolidine
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Fu, Kai-Ling, and 傅凱伶. "The Study of Microwave Accelerated Organic Reaction(1) Synthesis of N-Phenylanthranilic Acids(2) Synthesis of N-Substituted Pyrrole-2-carboxaldehyde." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/45843931195172457629.

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碩士<br>中興大學<br>化學系所<br>94<br>We report herein our studies on microwave-assisted N-phenylanthranilic acids formation and the synthesis of N-substituted pyrrole-2-carboxaldehyde. I. Preparation of N-phenylanthranilic acids The reaction times of the formation of N-phenylanthranilic acids, by reacting o-chlorobenzoic acid and substituted aniline, were greatly reduced from 2~4 hours in conventional method to 10 min by using domestic microwave irradiation at 800 W, and focused microwave irradiation at 270 W, while the yields were comparable. The above reaction did not work under neat or solid sup
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Book chapters on the topic "Carboxaldehyd"

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Ellis, G. P. "Chromone Carboxaldehydes." In Chemistry of Heterocyclic Compounds: A Series Of Monographs. John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470187012.ch19.

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Ellis, G. P. "Chroman Carboxaldehydes." In Chemistry of Heterocyclic Compounds: A Series Of Monographs. John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470187098.ch8.

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Bährle-Rapp, Marina. "2,4-Dimethyl-3-Cyclohexene Carboxaldehyde." In Springer Lexikon Kosmetik und Körperpflege. Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_3119.

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Méndeza, Leonor Y. Vargas, Vladimir V. Kouznetsov, Nüket Öcal, Zuhal Turgut, and Çiğdem Yolaçan. "Convenient Route to Quinoline-Tetrahydroquinolines from Quinoline-Carboxaldehydes." In Biodiversity. Springer US, 2002. http://dx.doi.org/10.1007/978-1-4419-9242-0_52.

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Hannuksela, A., A. Lahti, and M. Hannuksela. "Nonimmunologic Immediate Contact Reactions to Three Isomers of Pyridine Carboxaldehyde." In Current Topics in Contact Dermatitis. Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-74299-6_90.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of iron(III) complex with 2-hydroxynaphthalene-1-carboxaldehyde." In Magnetic Properties of Paramagnetic Compounds. Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-53971-2_230.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of cobalt(II) complex with 2-hydroxynaphthalene-1-carboxaldehyde." In Magnetic Properties of Paramagnetic Compounds. Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-53971-2_505.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of cobalt(II) complex with 2-hydroxynaphthalene-1-carboxaldehyde." In Magnetic Properties of Paramagnetic Compounds. Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-53971-2_506.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of cobalt(II) complex with 2-hydroxynaphthalene-1-carboxaldehyde." In Magnetic Properties of Paramagnetic Compounds. Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-53971-2_507.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of nickel(II) complex with 2-hydroxynaphthalene-1-carboxaldehyde." In Magnetic Properties of Paramagnetic Compounds. Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-53971-2_828.

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Conference papers on the topic "Carboxaldehyd"

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Premkumar, R., R. Mohamed Asath, T. Mathavan, and A. Milton Franklin Benial. "Structural, vibrational spectroscopic and quantum chemical studies on indole-3-carboxaldehyde." In DAE SOLID STATE PHYSICS SYMPOSIUM 2016. Author(s), 2017. http://dx.doi.org/10.1063/1.4980823.

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Bosshard, Christian, Pan Feng, Man Shing Wong, Martin Bösch, Urs Meier, and Peter Günter. "Thiophene Based Hydrazones: a New Class of Nonlinear Optical Molecular Crystals." In Organic Thin Films for Photonic Applications. Optica Publishing Group, 1997. http://dx.doi.org/10.1364/otfa.1997.thd.2.

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Crystalline solids are often regarded as the best choice of material form for practical use as optical frequency converters because of the excellent long-term orientational stability and extremely high density of active components. Such materials can be combined with inexpensive diode lasers for optic parametric generation of a broad range of optical frequencies [1, 2]. We here report on our on-going efforts in the development of novel and highly efficient second-order nonlinear optical crystalline materials for frequency conversion, based on the hydrazone derivatives 5-(methylthio)-thiophenec
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Ibrahim, Magdy, Tarik Ali, Azza El-Kazak, and Amira Mohamed. "Synthesis and Chemical Reactivity of the Novel 6,8-Dibromo-7-hydroxychromone-3-carboxaldehyde." In The 16th International Electronic Conference on Synthetic Organic Chemistry. MDPI, 2012. http://dx.doi.org/10.3390/ecsoc-16-01062.

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Liu, Yongchun, Yingying Li, Huili Qi, Huansheng Hu, Ruixia Lei, and Jianning Liu. "DNA BINDING PROPERTIES OF SCANDIUMIII COMPLEXES DERIVED FROM THREE 8-HYDROXYQUINOLINE-2-CARBOXALDEHYDE-AROYLHYDRAZONES." In 2016 International Conference on Biotechnology and Medical Science. WORLD SCIENTIFIC, 2016. http://dx.doi.org/10.1142/9789813145870_0056.

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Kumru, Mustafa, Haidar Alfanda, and Mustafa Kocademir. "EXPERIMENTAL AND THEORETICAL STUDIES ON THE ELECTRONIC ABSORPTION SPECTRA OF QUINOLINE CARBOXALDEHYDES." In 69th International Symposium on Molecular Spectroscopy. University of Illinois at Urbana-Champaign, 2014. http://dx.doi.org/10.15278/isms.2014.wi05.

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Jeyaseelan, S. Christopher, Shamima Hussain, R. Premkumar, T. N. Rekha, and A. Milton Franklin Benial. "Conformational, vibrational spectroscopic and quantum chemical studies on 5-methoxyindole-3-carboxaldehyde: A DFT approach." In DAE SOLID STATE PHYSICS SYMPOSIUM 2017. Author(s), 2018. http://dx.doi.org/10.1063/1.5028627.

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Chow, Zeta, Jeremy Johnson, Aman Chauhan, et al. "Abstract PO-014: 3-Aminopyridine-2-carboxaldehyde thiosemicarbazone (3-AP): A promising radiochemotherapy for gastroenteropancreatic neuroendocrine tumors." In Abstracts: AACR Virtual Special Conference on Radiation Science and Medicine; March 2-3, 2021. American Association for Cancer Research, 2021. http://dx.doi.org/10.1158/1557-3265.radsci21-po-014.

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Jabbar, Alyaa, and Yasameen K. Al-Majedy. "Synthesis and bio-evaluation of 2-Methyl Indole-3-carboxaldehyde derivatives as potential lanosterol 14-demethylase inhibitors." In 4TH INTERNATIONAL CONFERENCE ON INNOVATION IN IOT, ROBOTICS AND AUTOMATION (IIRA 4.0). AIP Publishing, 2025. https://doi.org/10.1063/5.0255335.

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Shaik, Afzal, Kasetti Babu, Indrajeet Singhvi, N. Ravindra, and Richie Bhandareh. "Design, synthesis and biological screening of 2,4-dichlorothiazole-5-carboxaldehyde-derived chalcones as potential antitubercular and antiproliferative agents." In 6th International Electronic Conference on Medicinal Chemistry. MDPI, 2020. http://dx.doi.org/10.3390/ecmc2020-07377.

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