Biomimetic total synthesis of steroids, IX. Stereospecific synthesis of C-homo-19-norsteroids
作者:M. B. Groen、B. Hindriksen、F. J. Zeelen
DOI:10.1002/recl.19851040206
日期:——
Cationic cyclization of 2-[7-(3-methoxyphenyl)-(E)-4-heptenyl]-3-methyl-2-cyclopentenol (1c) produced 3-methoxy-17-methyl-C-homo-1,3,5(10),13(17)-gonatetraene (3c) and its 1-methoxy isomer 2c. Epoxidation of 3c with tert-butyl hydroperoxide in the presence of molybdenum hexacarbonyl produced the corresponding 13α, 17α-epoxide 14 as the major product, which, in three steps, was converted into C-homo-1
2- [7-(3-甲氧基苯基)-(E)-4-庚烯基] -3-甲基-2-环戊烯醇(1c)的阳离子环化产生了3-甲氧基-17-甲基-C-homo-1,3, 5(10),13(17)-邻苯二甲酸三烯(3c)及其1-甲氧基异构体2c。在六羰基钼的存在下,用叔丁基氢过氧化物对3c进行环氧化,生成相应的13α,17α-环氧化合物14为主要产物,该产物在三个步骤中转化为C-homo-1,3,5(10)-雌三烯-3,17β-二醇(18)。