Alternative syntheses of the C9-C15 and C1-C5 segments of erythronolide A via regio- and stereo-selective reductive ring opening of 2,3-epoxy alcohols.
作者:Hitoshi TONE、Masataka HIKOTA、Tatsuo HAMADA、Takao NISHI、Yuji OIKAWA、Osamu YONEMITSU
DOI:10.1248/cpb.37.1155
日期:——
Improved syntheses are described of two segments required for the total synthesis of (9S)-9-dihydroerythronolide. A, i.e., (2S, 3R, 4S, 5R)-2, 4-dimethyl-5-(4-methoxybenzyloxy)heptane-1, 3, 4-triol corresponding to the C9-C15 subunit and (2S, 3R, 4R)-5-benzyloxy-2, 3-dimethylpentane-1, 4-diol corresponding to the C1-C5 subunit, via regio- and stereo-selective reduction of 2, 3-epoxy alcohols.
改进了合成方法,以获得总合成(9S)-9-二氢红霉素所需的两个片段。A,即(2S,3R,4S,5R)-2, 4-二甲基-5-(4-甲氧基苄氧)庚烷-1, 3, 4-三醇,对应于C9-C15亚单位;(2S,3R,4R)-5-苄氧-2, 3-二甲基戊烷-1, 4-二醇,对应于C1-C5亚单位,通过区域和立体选择性还原2, 3-环氧醇得到。