Total Synthesis of Optically Active Costaclavine. Synthetic Studies of Indoles and Related Compounds. Part 48.
作者:Kumi OSANAI、Yuusaku YOKOYAMA、Kazuhiro KONDO、Yasuoki MURAKAMI
DOI:10.1248/cpb.47.1587
日期:——
The first total synthesis of optically active costaclavine (18), an ergot alkaloid, was accomplished starting from methyl [4R-(Z)]-[4-[[(1, 1-dimethylethoxy)carbonyl]methylamino]-3, 4-dihydro-1-[(4-methylphenyl)sulfonyl]-benz[cd]indol-5(1H)-ylidene]acetate (8), which was prepared by intramolecular cyclization of 1, 1-dimethylethyl[1R-(E)]-[1-[[4-bromo-1-[(4-methylphenyl)-sulfonyl]-1H-indol-3-yl]methyl]-4-carbomethoxy-2-propenyl]methylcarbamate (7) according to the method we developed earlier during the course of the total synthesis of chanoclavine-I (9).
首次全合成光学活性的麦角生物碱哥斯达拉素 (18),以甲基 [4R-(Z)]-[4-[[(1, 1-二甲基乙氧基)羰基]甲基氨基]-3, 4- 为原料完成。二氢-1-[(4-甲基苯基)磺酰基]-苯并[cd]吲哚-5(1H)-亚基]乙酸酯(8),由1, 1-二甲基乙基[1R-(E)]分子内环化制备-[1-[[4-溴-1-[(4-甲基苯基)-磺酰基]-1H-吲哚-3-基]甲基]-4-甲甲氧基-2-丙烯基]甲基氨基甲酸酯(7)根据我们的方法在 chanoclavine-I 的全合成过程中较早发展起来 (9)。