Mitsunobu reactions with methanesulfonic acid; The replacement of equatorial hydroxyl groups by azide with net retention of configuration
作者:Anthony P. Davis、Stephan Dresen、Laurence J. Lawless
DOI:10.1016/s0040-4039(97)00886-1
日期:1997.6
of equatorial cyclohexanols with Ph3P/DEAD/MsOH gives clean conversion to the axial mesylates. Subsequent reaction with NaN3 gives the equatorial azides in overall yields of 74–87%. Axial hydroxyl groups are not affected, allowing the regioselective conversion of methyl cholate into a 3α-azidodiol intermediate for steroid-based synthetic receptors.
用Ph 3 P /
DEAD / MsOH处理赤道
环己醇可将其干净地转化为轴向
甲磺酸酯。随后与NaN 3的反应使赤道
叠氮化物的总产率为74-87%。轴向羟基不受影响,允许
胆甾醇将区域选择性地转化为基于类
固醇的合成受体的3α-
叠氮二醇中间体。