作者:Takashi Matsumoto、Shuji Usui
DOI:10.1246/bcsj.56.491
日期:1983.2
m-chloroperbenzoic acid, followed by treatment of the resulting epoxide with lithium diethylamide, afforded 3-[2-(2-furyl)ethyl]-4,4-dimethyl-2-methylenecyclohexanol (6). The alcohol 6 was dehydrated with refluxing hexamethylphosphoric triamide to give pallescensin 2. Oxidation of 6 with pyridinium chlorochromate, followed by intramolecular cyclization with 85% phosphoric acid, afforded 5,5a,6,7,8,9,9a,10-octahydro-6
用间氯过苯甲酸氧化合成的pallescensin 1,然后用二乙胺锂处理所得环氧化物,得到3-[2-(2-呋喃基)乙基]-4,4-二甲基-2-亚甲基环己醇(6)。醇 6 用回流的六甲基磷酸三酰胺脱水,得到 pallescensin 2。用氯铬酸吡啶氧化 6,然后用 85% 磷酸分子内环化,得到 5,5a,6,7,8,9,9a,10-八氢- 6,6-二甲基-4H-苯并[5,6]环庚[1,2-b]呋喃-9-one。通过 α-苯基硒酮将其转化为相应的 α,β-不饱和酮 (10)。用氢化铝锂还原 10,然后在 200-210°C 下用六甲基磷酰胺脱水,得到 pallescensin G,进一步异构化为 pallescensin F。