Rhodium-Catalyzed Rearrangement of α-Diazo Thiol Esters to Thio-Substituted Ketenes. Application in the Synthesis of Cyclobutanones, Cyclobutenones, and <i>β</i>-Lactams
作者:Michael D. Lawlor、Thomas W. Lee、Rick L. Danheiser
DOI:10.1021/jo000227c
日期:2000.7.1
Exposure of alpha-diazo thiol esters (1) to the action of catalytic rhodium(II) acetate leads to a remarkably facile "thia-Wolff rearrangement", producing thio-substituted ketenes which combine with a variety of ketenophiles to provide access to alpha-thiocyclobutanones, cyclobutenones, and beta-lactams. Reductive desulfurization of these cycloadducts takes place under mild conditions and in excellent
将α-重氮硫醇酯(1)暴露于乙酸乙酸铑(II)的作用会导致非常容易的“ thia-Wolff重排”,产生硫代取代的乙烯酮,与各种酮基亲和剂结合提供α-硫代环丁酮,环丁烯酮和β-内酰胺类。这些环加合物的还原脱硫反应在温和的条件下以极好的收率进行,因此,该序列代表了现有的基于二氯乙烯酮的方法合成四元碳环和杂环的有用新方法。