Results 21 to 30 of about 9,914 (265)
Molecules, 2021 N-Sulfonyl amidines are developed from a Cu-catalyzed three-component reaction from sulfonyl hydrazines, terminal alkynes and sulfonyl azides in toluene at room temperature.
Yu Zhao +3 more
doaj +1 more source
Organic solvent-free synthesis of sulfonyl hydrazides in water
Tetrahedron Green Chem, 2023 An organic solvent-free synthesis of sulfonyl hydrazides has been achieved in water. The reactions of equimolar amount of sulfonyl chlorides and hydrazines afforded a series of substituted sulfonyl hydrazides at 60 °C for 1 h in water as a solvent in ...
Shizuki Noda, Shinji Tanimori
doaj +1 more source
Novel one-pot process for the synthesis of ethyl 2-imino-4-methyl-2,3-dihydrothiazole-5-carboxylates [PDF]
Journal of the Serbian Chemical Society, 2015 A facile one-pot two-step process for the synthesis of ethyl 2-imino-4-methyl-2,3-dihydrothiazole-5-carboxylates via the cyclocondensation of ethyl 2-thiocyanatoacetoacetate with a variety of hydrazine and hydrazide derivatives has been ...
Beyzaei Hamid, Aryan Reza, Moghadas Hadi
doaj +1 more source
ON THE OXIDATION OF HYDRAZINE. II. [PDF]
Journal of the American Chemical Society, 1907 n ...
Browne, A. W., Shetterly, F. F.
openaire +6 more sources
Results in Chemistry, 2022 An efficient, fast, and environmentally gentle protocol for phthaloylation of amines, hydrazines and hydrazides via transamidation is described. The current research focuses on the phthaloylation of alicyclic, aliphatic, aromatic, heterocyclic amines ...
Prerna Ganwir +2 more
doaj +1 more source
Cyanothioacetamides as a synthetic platform for the synthesis of aminopyrazole derivatives
Beilstein Journal of Organic Chemistry, 2023 It was shown that the reaction of 2-cyanothioacetamides with hydrazine involves both cyano- and thioamide groups, and 3,5-diaminopyrazoles are formed. In the reaction of 2-cyano-3-(dimethylamino)-N,N-dimethylprop-2-enethioamides with hydrazine and its ...
Valeriy O. Filimonov +4 more
doaj +1 more source
2-tert-Butyl-5,6,7,8,9,10-hexahydrocyclohepta[b]indole
Molbank, 2011 2-tert-Butyl-5,6,7,8,9,10-hexahydrocyclohepta[b]indole was synthesized by reaction of cycloheptanone and (4-tert-butylphenyl)hydrazine hydrochloride in the presence of sodium acetate and sulfuric acid in glacial acetic acid via Fischer indole synthesis.
Janina Wobbe +5 more
doaj +1 more source
Synthesis of the Fmoc-aza-Arg(Boc)2 precursor via hydrazine alkylation; pp. 438–443 [PDF]
Proceedings of the Estonian Academy of Sciences, 2014 The aza-arginine precursor Fmoc-aza-Arg(Boc)2 was synthesized starting from mono-protected hydrazines via an aza-ornithine precursor. This reaction path is shorter and more efficient than the reductive alkylation reaction.
Anton Mastitski +2 more
doaj +1 more source
, 2016 A straightforward and facile method has been developed to prepare 1,1-disubstituted hydrazines via Lewis base promoted direct reductive hydrazination. Under the catalysis of hexamethylphosphoramide (HMPA) and N,N-dimethylacetamide (DMAc), respectively ...
Di, X +5 more
core +2 more sources
Ultrasonics Promoted Synthesis of 5-(Pyrazol-4-yl)-4,5-Dihydropyrazoles Derivatives
Applied Sciences, 2013 A series of new 1,3-diaryl-5-(1-phenyl-3-methyl-5-chloropyrazol-4-yl)-4,5-dihydropyrazole derivatives have been synthesized under sonication conditions in ethanol or methanol/glacial acetic acid mixture (5/1 ratio) with two equivalents of hydrazines and ...
Manuel Nogueras +4 more
doaj +1 more source