β-砜基黄原酸酯制备中的介质效应及其非对映异构体的确证

Medium Effect on the Preparation of β Sulfonyl Xanthates and Configurational Assignments of the Diastereoisomeric Xanthates

制备β－砜基黄原酸酯过程中应用ＨＭＰＡ可增强β－砜基醇锂的亲核性，使醇锂定量地转化为黄原酸酯．通过测定中间体β－砜基醇结构确证了β－砜基黄原酸酯非对映异构体的结构．

Application of HMPA in the preparation of β sulfonyl xanthates can improve the nucleophilicity of lithium β sulfonyl alcolate. Conversion of the lithium alcolates into xanthates can be quantitatively carried out. The configurations of β sulfonyl xanthates can be assigned by means of characterization of the corresponding intermediates: β sulfonyl alcohols.