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
作者:Lucija Jukić Soršak、Gorazd Soršak、Renata Toplak、David Bevk、Jurij Svete、Branko Stanovnik
DOI:10.1002/jhet.5570430511
日期:2006.9
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
在本文中,描述了2-(苄氧基羰基)氨基-3-二甲基氨基丙烯酸(1)与肼,烷基,芳基和杂芳基取代的肼通过相应的12-16的区域特异性转化为吡唑17-25。杂芳基取代的腙13-16通过氧化用溴或四乙酸铅的相应的取代的(1,2,4-三唑并[4,3得到b ]哒嗪-3-基)甘氨酸盐27-30。2-(2,2-二取代-1-乙烯基)氨基-3-二甲基氨基丙烯酸烷基酯31-33与肼一起生成2- [2,2-(二取代)乙烯基]氨基-3-杂芳基肼基丙酸烷基酯40-48和2-烷基2,3-双((杂)芳基肼基)丙酸酯51-55。