Diastereoselective α-Fluorination of <i>N</i>-<i>tert</i>-Butanesulfinyl Imidates
作者:Wei Huang、Yun Yao、Yan-Jun Xu、Chong-Dao Lu
DOI:10.1021/acs.joc.8b02375
日期:2018.12.7
A diastereoselective α-fluorination of N-tert-butanesulfinyl imidates was developed. Deprotonation of N-tert-butanesulfinyl imidates with lithium hexamethyldisilazide generates aza-enolates that can be intercepted, with excellent diastereocontrol, by the inexpensive electrophilic fluorinating agent NFSI. This protocol was applied to the preparation of synthetically useful trans-2-fluoro-cyclohexamine
的非对映选择性α-氟化ñ -叔-butanesulfinyl亚氨酸酯的开发。去质子化ñ -叔-butanesulfinyl亚氨酸酯与锂六甲基二硅生成氮杂-烯醇化物,可以被截获,具有优良的diastereocontrol,由廉价的电氟化剂NFSI。该方案用于制备具有高对映体纯度(99.5%ee)的合成有用的反式-2-氟-环己胺。