Tertiary Thiols from Allylic Thiocarbamates by Tandem Enantioselective [3,3]-Sigmatropic Rearrangement and Stereospecific Arylation
作者:Gaëlle Mingat、Paul MacLellan、Marju Laars、Jonathan Clayden
DOI:10.1021/ol5002522
日期:2014.2.21
enriched N-aryl allylic thiocarbamates. Formation of an allyllithium derivative promotes intramolecular N to C aryl migration to the position α to sulfur, generally with good stereospecificity. The substrates may themselves be obtained by Pd-catalyzed enantioselective [3,3]-sigmatropic rearrangement of N-aryl O-allyl thiocarbamates. Solvolysis of the product thiocarbamates yields tertiary thiols, which
对映体富集形式的叔硫醇的合成通过对映体富集的N-芳基烯丙基硫代氨基甲酸酯的锂化来完成。烯丙基锂衍生物的形成促进分子内N至C芳基迁移至α位至硫,通常具有良好的立体特异性。底物本身可以通过N-芳基O-烯丙基硫代氨基甲酸酯的Pd催化的对映选择性[3,3]-σ重排而获得。产物硫代氨基甲酸酯的溶剂化产生叔硫醇,其可以转化为硫化物衍生物。