The direct pyrrolidine-catalyzed α-sulfenylation of aldehydes and ketones with the commercially available, very cheap chemical tetramethylthiuram disulfide (thiram) is described. The dithiocarbamoyl derivatives are obtained in good to excellent yields (47-98%). In the case of α-substituted aldehydes the protocol allows the generation of quaternary stereocenters. The sensibility of the α-sulfenylated carbonyl compounds for racemization has been investigated.
直接由
吡咯烷催化,通过市售的廉价
化学品四甲基
秋兰姆二
硫化物(thiram)实现醛和酮的α-亚磺酰化反应已有报道。所得二
硫代
氨基甲酸酯衍
生物产率良好至优异(47-98%)。对于α-取代的醛,该方案允许生成四级立体中心。已对α-亚磺酰化羰基化合物的消旋敏感性进行了研究。