Stereocontrolled total synthesis of (±)-totaryl methyl ether and (±)-semperviryl methyl ether
作者:Swati Das、Bhattachryya Sukanta、Mukherjee Debabrata
DOI:10.1016/s0040-4020(01)82004-4
日期:1992.1
the methyl ketone 16 in high yield. The compounds 5 and 16 were converted into the hydrophenanthrenones 6 and 7 respectively. Reductive methylation of 6 and 7 in anhydrous ammonia furnished the β, γ -unsaturated ketones 8 and 9 which were stereoselectively transformed into the -fused ketones 10 and 11. Huang-Minlon reduction of 10 and 11 afforded the octahydrophenanthrene 27 and (±)-totaryl methyl ether
描述了外消旋形式的标题二萜醚的立体控制合成。萘衍生物15的Friedel-Crafts酰化反应以高收率得到甲基酮16。将化合物5和16分别转化为对苯二酚酮6和7。6和7在无水氨中的还原甲基化作用提供了β,γ-不饱和酮8和9,它们被立体选择性地转化为稠合的酮10和11。黄民龙减10和11分别得到八氢菲27和(±)-甲苯基甲基醚(2)。27的Friedel-Crafts酰化提供了甲基酮28,该甲基酮被转化为(±)-semperviryl甲基醚(4)。