Reactions of methyl 2-(benzyloxycarbonyl)amino-3-dimethylaminopropenoate and related compounds with hydrazines. Regiospecific synthesis of 1-substituted-4-amino-substituted-1<i>H</i>-pyrazol-5-(2<i>H</i>)-ones
In this paper the regiospecific transformations of methyl 2-(benzyloxycarbonyl)amino-3-dimethylaminopropenoate (1) with hydrazine, alkyl-, aryl- and heteroaryl-substituted hydrazines via the corresponding hydrazones 12-16 into pyrazoles 17-25 are described. Heteroaryl-substitued hydrazones 13-16 afforded by oxidation with bromine or lead tetraacetate the corresponding substituted (1,2,4-triazolo[4
A simple stereoselective synthesis of 2Z and 2Z,1′E alkyl 3-acyloxy-2-(2,2-disubstituted ethenyl) aminopropenoates 4 from alkyl 2-(2,2-disubstituted ethenyl)amino-3-dimethylaminopropenoates 1 in 12–91% yield is presented.
作者:Sorsak, Gorazd、Grdadolnik, Simona Golic、Stanovnik, Branko
DOI:——
日期:——
Alkyl 2-[2,2-Disubstituted Ethenyl]amino-3-dimethylaminopropenoates in the Synthesis of Heterocyclic System. An Alternative Method for Preparation of 3-Amino-4H-pyrido[1,2-a]pyrimidin-4-ones