Alkali metal-liquid ammonia reduction of γ-lactones to diols and cyclic hemiacetals: stereochemical influence by the neighbouring group on the nature
作者:Asit K. Chkraborty、Bijali Saha、Chhanda Ray、Usha Ranjan Ghatak
DOI:10.1016/s0040-4020(01)90319-9
日期:——
Lithium or sodium-liquid aimmonia reduction of 3-hydroxy-1,3-dimethylcyclohexane-1,3-carbolactones (, () and () with or without a C-2 equatorial substituent gives the respective diols (), () and (), whereas the lactones () and (), having a C-2 axial substituent produce the respective cyclichemiacetals () and () as the sole products. A possible mechanism has been suggested for rationalisation of these