A convenient and highly stereoselective synthesis of 4α-deuterio and -Tritio steroids catalyzed by Pd
作者:Michael H. Rabinowitz
DOI:10.1016/0040-4039(91)80758-x
日期:1991.10
A simple and highly stereoselectivesynthesis of [4α-2H]- and [4α-3H]-Δ5-3β-hydroxysteroids is presented. Palladium(0)-mediated borodeuteride reduction of readily-available cholest-5-en-3β,4β-diol cyclic carbonate provides [4α-2H]- Δ5-and Δ4-cholesterol in a 12:1 ratio. Reduction of [4α-3H]-cholest-5-ene-3β,4β-diol cyclic carbonate with NaB1 H4 and Pd(0) resulted in [4β-3H]-cholesterol.