A new solution for the construction of the piperidine ring of strychnos alkaloids from 3a-(o-nitrophenyl)hexahydroindol-4-ones. Total syntheses of (±)-tubifolidine, (±)-dihydroakuammicine, and (±)-akuammicine
作者:Daniel Solé、Josep Bonjoch、Silvina García-Rubio、Ramon Suriol、Joan Bosch
DOI:10.1016/0040-4039(96)01054-4
日期:1996.7
Alkylation of cis-3a-(o-nitrophenyl)hexahydroindol-4-one 1 with 1-iodo-4-(trimethylsilyl)-2-butyne followed by BF3·Et2O-promoted cyclization of the resulting propargylic silane 2 afforded the tricyclic vinylidene ketone 3, which was further converted to the Strychnos alkaloids tubifolidine, 19,20-dihydroakuammicine, and akuammicine.
的烷基化顺-3a-(ø硝基苯基)hexahydroindol -4-酮1与1-碘代-4-(三甲基甲硅烷基)-2-丁炔,随后BF 3 ·的Et 2所得炔丙基硅烷的O形环化促进2得到三环酮亚乙烯基3,将其进一步转化成马钱子生物碱tubifolidine,19,20-dihydroakuammicine,和akuammicine。