Stereoselective synthesis of the brassinolide side chain; novel syntheses of brassinolide and related compounds
作者:Zhou Wei-shan、Jiang Biao、Pan Xin-fu
DOI:10.1016/s0040-4020(01)85457-0
日期:1990.1
A stereoselectivesynthesis of the brassinolide side chain involves the lactonization of Z-10 under acidic condition to give an α,β-unsa-turated-δ-lactone 11 with the inversion of the configuration at C-22 of the epoxy steroid in quantitative yield. The 22R,23R,24S-γ-hydroxy-δ-lactone 14 was used as key intermediate for the syntheses of brassinolide(1), homobrassinolide(2), and typhasterol(4) as well
Simple, stereocontrolled syntheses of 24(S),25-epoxy-22(R)-hydroxycholesterol, 22(R),24(S)-dihydroxycholesterol and diastereomers, new ligands for binding and activation of LXRs
作者:E.J. Corey、Michael J. Grogan
DOI:10.1016/s0040-4039(98)02182-0
日期:1998.12
Described herein are stereocontrolled syntheses of a series of sidechain oxygenated cholesterols for the study of binding and activation of nuclear receptors of the LXR family. (C) 1998 Elsevier Science Ltd. All rights reserved.
ZHOU, WEI-SHAN;BIAO, JIANG;PAN, XIN-FU, J. CHEM. SOC. CHEM. COMMUN.,(1989) N0, C. 612-614