Zinc-Mediated Diastereoselective Synthesis of 3-Amino Oxindoles by Addition of Methyl and Terminal Alkynes to <i>N</i>-<i>tert</i>-Butanesulfinyl Ketimines
作者:Wenjin Yan、Dong Wang、Jingchao Feng、Peng Li、Rui Wang
DOI:10.1021/jo300110a
日期:2012.4.6
A zinc-mediated addition of methyl and terminal alkyines to chiral N-tert-butanesulfinyl ketimines for the preparation of optical quaternary 3-amino oxindoles was reported. In general, the operationally simple reaction affords the desired products in high yields and good to excellent diastereoselectivities. Subsequent convenient cleavage of sulfinyl protecting group under mild conditions was presented without racemization.