Synthesis of [26,27-2H6]brassinosteroids from 23,24-bisnorcholenic acid methyl ester
作者:Andrey P. Antonchick、Bernd Schneider、Vladimir N. Zhabinskii、Vladimir A. Khripach
DOI:10.1016/j.steroids.2004.05.014
日期:2004.9
23R-diol function were prepared starting from 23,24-bisnorcholenic acid methyl ester for biosynthetic studies. Synthesis of the cyclic part was accomplished via the initial hydroboration-oxidation of Delta(5)-double bond. The key step in the synthesis of the side chain involved addition of (2S)-[3,4-(2)H(6)]2,3-dimethylbutylphenyl sulfone to the corresponding C-22 aldehydes.
Synthesis of hexadeuterated 23-dehydroxybrassinosteroids
作者:Vladimir A. Khripach、Vladimir N. Zhabinskii、Andrey P. Antonchick、Olga V. Konstantinova、Bernd Schneider
DOI:10.1016/s0039-128x(02)00071-5
日期:2002.12
instead of the 22R,23R-diol function characteristic for most compounds of this class were prepared for biochemical studies. The corresponding non-deuterated compounds are considered intermediates in brassinolide biosynthesis. The carbonskeleton of the side chain with proper stereochemistry at C(24) was prepared from commercially available (2R)-3-hydroxy-2-methylpropanoate. This low molecular fragment was