Base or copper promoted annulation reactions of alpha-aminohydrazones

被引：19

作者：

Arcadi, A

Attanasi, OA

DeCrescentini, L

Rossi, E

机构：

[1] UNIV URBINO,FAC SCI,IST CHIM ORGAN,I-61029 URBINO,ITALY

[2] UNIV MILAN,FAC FARM,IST CHIM ORGAN,I-20139 MILAN,ITALY

来源：

TETRAHEDRON LETTERS | 1997年 / 38卷 / 13期

关键词：

D O I：

10.1016/S0040-4039(97)00306-7

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

The title compounds, obtained by 1,4-addition of sarcosine or glycine ethyl ester on conjugated azoalkenes, gave the 1-ureido-4-amino-3-methyl-1H-pyrazol-5(2H)-ones through a base promoted heterocyclization process, while in the presence of copper (I) species the 1-ureido-5-methyl-4-imidazolines and the 4-methoxycarbonyl 5-methyi-1-ureidoimidazole were obtained. The mechanism of these reactions is discussed. (C) 1997 Published by Elsevier Science Ltd.

引用

页码：2329 / 2332

页数：4

共 19 条

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