[3,3]-Sigmatropic rearrangements: short, stereocontrolled syntheses of functionalized vitamin D3 side-chain units
摘要:
Enantiomerically pure C,D-ring allylic alcohol 4 stereospecifically undergoes five types of [3,3]-sigmatropic rearrangements to give C-23 functionalized 16-ene vitamin D-3 side-chain units with natural C-20(5) stereochemistry. (C) 2002 Elsevier Science Ltd. All rights reserved.
[3,3]-Sigmatropic rearrangements: short, stereocontrolled syntheses of functionalized vitamin D3 side-chain units
摘要:
Enantiomerically pure C,D-ring allylic alcohol 4 stereospecifically undergoes five types of [3,3]-sigmatropic rearrangements to give C-23 functionalized 16-ene vitamin D-3 side-chain units with natural C-20(5) stereochemistry. (C) 2002 Elsevier Science Ltd. All rights reserved.