3-Substituted-γ-butyrolactones from 5-Trimethylsilyl-2-cyclohexenone. Synthesis of (−)-Enterolactone
摘要:
1,4-Adducts of 5-trimethylsilyl-2-cyclohexenone (1) with Grignard reagents were converted to various hexanoate derivatives and γ-butyrolactones.从光学纯的 1 开始,合成了 (-)- 肠内酯(因子 X)。
3-Substituted-γ-butyrolactones from 5-Trimethylsilyl-2-cyclohexenone. Synthesis of (−)-Enterolactone
摘要:
1,4-Adducts of 5-trimethylsilyl-2-cyclohexenone (1) with Grignard reagents were converted to various hexanoate derivatives and γ-butyrolactones.从光学纯的 1 开始,合成了 (-)- 肠内酯(因子 X)。
The selective construction of bicyclo[3.3.0]octan-1-ols and bicyclo[3.1.0]hexan-1-ols was achieved by using an allylSmBr/additive(s) system. By employing HMPA as the only additive, the momoallylation/ketone–alkene coupling occurred preferably and afforded bicyclo[3.3.0]octan-1-ols in good yields with high diastereoselectivities. While the ester–alkene coupling predominated to generate bicyclo[3.1.0]hexan-1-ols