Zinc-catalyzed synthesis of pyrazolines and pyrazoles via hydrohydrazination

被引：111

作者：

Alex, Karolin ^{[1
]}

Tillack, Annegret ^{[1
]}

Schwarz, Nicolle ^{[1
]}

Beller, Matthias ^{[1
]}

机构：

[1] Univ Rostock, Leibniz Inst Katalyse eV, D-18059 Rostock, Germany

来源：

ORGANIC LETTERS | 2008年 / 10卷 / 12期

关键词：

D O I：

10.1021/ol800592s

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

A novel regioselective synthesis of aryl-substituted pyrazolines and pyrazoles has been developed. Substituted phenylhydrazines react with 3-butynol in the presence of a catalytic amount of zinc triflate to give pyrazoline derivatives. The resulting products are easily oxidized in a one-pot procedure to the corresponding pyrazoles.

引用

页码：2377 / 2379

页数：3