Enantioselective synthesis of phospholanes using chiral lithium amide desymmetrisation
作者:Alexander J Blake、Stephen C Hume、Wan-Sheung Li、Nigel S Simpkins
DOI:10.1016/s0040-4020(02)00366-6
日期:2002.6
The enantioselective deprotonation of 1,2,5-triphenylphospholane oxide with a chiral base, followed by electrophilic quenching, gives a range of chiral products in good yield and in ca. 85% ee. The absolute and relative configuration of two of the products was determined by X-ray crystallography. A number of the chiral phospholane oxides were subjected to further transformations, in particular reduction
用手性碱将1,2,5-三苯基膦氧化物的对映选择性去质子化,然后进行亲电猝灭,可得到一系列收率良好且收率约1的手性产物。85%ee。通过X射线晶体学测定两种产物的绝对和相对构型。使许多手性磷戊烯氧化物进一步转化,特别是还原,得到对映体纯的磷戊烯。