Sulfur Ylides via Decarboxylation of Carboxymethylsulfonium Betaines: A Novel and Mild Protocol for the Preparation of Oxiranes
作者:David C. Forbes、Michael C. Standen、Derrick L. Lewis
DOI:10.1021/ol034612a
日期:2003.6.1
of sulfur ylides is described. The overall process involves thermal decarboxylation of a carboxymethylsulfonium betaine to give a sulfur ylide that, in the presence of an aldehyde, affords the corresponding terminal oxirane. Yields were found to correlate with the electron deficiency of the aryl aldehyde. In situ generation of betaine in the presence of an aldehyde successfully afforded the desired oxirane
描述了一种用于产生硫酰化物的新颖方案。整个过程涉及羧甲基s甜菜碱的热脱羧,得到硫代叶立德,其在醛的存在下提供相应的末端环氧乙烷。发现产率与芳基醛的电子缺乏相关。在醛存在下原位产生甜菜碱成功地以中等收率提供了所需的环氧乙烷,从而证明了催化方法的可行性。[反应:看文字]