Results 61 to 70 of about 2,197 (187)
Hydrochlorides, hydrates, hydronitrate, and an unanticipated hydrolysis product of famotidine
Acta Crystallographica Section C, Volume 82, Issue 5, Page 241-249, May 2026.The structures of a new polymorph of famotidine hydrochloride, a famotidine hydrochloride hydrate, a new hydronitrate salt of famotidine, and an unexpected hydrolyzed complex of famotidine are reported. The famotidine hydrochloride hydrate and the hydrolyzed famotidine hydrochloride have Z′ values of 2 and 4, respectively.This article contributes to ...
MacKenzie C. Weaver +2 more
wiley +1 more source
A four-step synthesis of novel (S)-1-(heteroaryl)ethan-1-amines from (S)-Boc-alanine
Acta Chimica Slovenica, 2014 A series of (S)-1-(pyrimidin-4-yl)-, and regioisomeric (S)-1-(pyrazolo[1,5-a]pyrimidin-7-yl)-, and (S)-1-(pyrazolo[1,5-a]pyrimidin-5-yl)ethan-1-amines were prepared by cyclisation of (S)-N-Boc-alanine-derived ynone with N,N-1,3-dinucleophiles, such as ...
Jurij Svete +3 more
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Synthesis and Characterization of 6-Carbamoyl-1,2-dihydropurines
E-Journal of Chemistry, 2007 The aromatic amines react readily with (Z)-N-(2-amino-1,2-dicyanovinyl)formimidate (4) to give the amidines (5a-b), which cyclize in the presence of DBU (1,8-diazabicyclo[5.4.0]undec-7-ene) to give the corresponding 2-(5-Amino-1-phenyl-1H-imidazol-4-yl ...
Asieh Yahyazadeh, Fatemah Hossaini
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Multicomponent Synthesis of 3,6-Dihydro-2H-1,3-thiazine-2-thiones
Molecules, 2012 Non-fused 3,6-dihydro-2H-1,3-thiazine-2-thiones constitute a so far rather unexplored class of compounds, with the latest report dating back more than two decades.
Frans J. J. de Kanter +6 more
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E-Journal of Chemistry, 2011 Reaction of N1,N2-di-(4-methoxyphenyl)- or N1,N2-di-(4-hydroxyphenyl) -amidines (1a-d) with 3,4,5,6-tetrachloro-1,2-benzoquinone (2) in ethyl acetate at room temperature led to formation of new 3,4,5-trichloro-6-(2-hydroxy-6-methyldibenzo[d,f][1,3 ...
Mohsen A. M. Gomaa
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, 2014 Citation: 'amidines' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.A00267 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
openaire +1 more source
3-Amino-2H-azirine, Moleküle mit vielfältigen Reaktionsmöglichkeiten
CHIMIA, 1979 3-Amino-2H-azirines, cyclic three-membered amidines with an estimated ring strain of about 200 kJ/mole, undergo a variety of reactions. Thereby, each of the azirine bonds can be broken: Thermolysis leads to the rupture of the C(2),C(3)-bond, with strong
Heinz Heimgartner
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Beilstein Journal of Organic ChemistryA chitosan-supported CuI (CS@CuI) catalyst was developed for the synthesis of quinazolinones from 2-halobenzoic acids (including iodine and bromine) and amidines. The reaction proceeds under mild reaction conditions, demonstrating a broad substrate scope
Xuhong Zhao +6 more
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Beilstein Journal of Organic ChemistryThe Groebke–Blackburn–Bienaymé (GBB) three-component reaction, discovered in 1998, is a very efficient strategy to assemble imidazo[1,2-a]-heterocycles starting from amidines, aldehydes and isocyanides.
Cristina Martini +2 more
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KF/Al2O3: As a Solid Phase and Recyclable Basic Catalyst for Synthesis Mono and Bis Pyrimidine Derivatives [PDF]
Iranian Journal of Chemistry & Chemical Engineering, 2017 KF/Al2O3 as a green and efficient catalyst has been used for the synthesis of mono and bis pyrimidine derivatives via three-component reaction of amidines, malononitrile, and aldehydes in EtOH at reflux.
Mehdi Abaszadeh, Mohammad Seifi
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