A process for the preparation of yuehchukene, 11β-(3'- indolyl)-7, 9α, 9β-trimethyl-5β, 8, 9, 10β-tetrahydroindano-[2, 3-b-] indole in which 3-(3-methyl-buta-1, 3-dienyl) indole is cyclized in solution in an organic solvent in the presence of silicia gel at temperatures of 60 to 80°C, e.g. by reflux with benzene as the solvent and/or in the presence of an acid catalyst such as trifluoroacetic acid. In turn the 3-(3-methyl- buta-1, 3-dienyl) indole can be prepared from indole-3-carbaldehyde by protecting the nitrogen atom, reaction with the Grignard reagent derived from 3-chloro-2-methylprop-1- ene, followed by deprotection and dehydration.
一种制备
月桂烯、11β-(3'-
吲哚基)-7,9α,9β-三甲基-5β,8,9,10β-四氢
茚并-[2,3-b-]
吲哚的工艺,其中 3-(3-甲基-丁-1,3-二烯基)
吲哚在有机溶剂中的溶液中,在
硅胶存在下于 60 至 80℃的温度下环化,例如以苯为溶剂回流和/或在酸催化剂如
三氟乙酸存在下环化。例如,以苯为溶剂和/或在酸催化剂(如
三氟乙酸)存在下进行回流。而 3-(3-甲基-丁-1,3-二烯基)
吲哚可以通过保护氮原子,与 3-
氯-2-甲基丙-1-烯衍生的
格氏试剂反应,然后脱保护和脱
水,从
吲哚-3-
甲醛制备。