Studies on stereocontrolled epoxidations of bis-alicyclic alcohols in steroidal skeletons: preparation of eight diastereomerically pure epoxides from cholest-4-en-3β,6β-; -3β,6α-; -3α,6β- and -3α,6α-diols
作者:Kejun Zhao、Yongfeng Wang、David C. Billington
DOI:10.1016/s0957-4166(01)00174-4
日期:2001.5
Eight diastereomericallypure epoxides have been prepared from cholest-4-en-3β,6β; -3β,6α-; -3α,6β- and -3α,6α-diols via a combination of steric, protecting group and oxidant effects on stereocontrolled epoxidations of a bis-alicyclic alcohol system within the steroidal skeleton.
A MULTIGRAM PREPARATIVE SYNTHESIS OF CHOLEST-4-EN-3α,6β- AND -3α,6α-DIOLS
作者:Kejun Zhao、Yongfeng Wang、David C. Billington
DOI:10.1081/scc-100105387
日期:2001.1.1
A preparative synthesis of cholest-4-en-3 alpha ,6 beta- and -3 alpha ,6 beta -diols 10 and 15 using cheap reagents and simple working-up procedures without chromatography on a multigram scale is described.