作者:Yusuf Özlü、David E. Cladingboel、Philip J. Parsons
DOI:10.1016/s0040-4020(01)85078-x
日期:1994.2
A novel free radical cyclisation approach for the synthesis of lysergic acid analogues has been investigated. The homolytic cleavage of carbon-bromine bond, mediated by tri-n-butyltin hydride, led to the development of a method for the construction of 3,4-disubstituted dihydroindoles via single cyclisation; hexahydrobenz[cd]indoles via double tandem cyclisations and both octahydroindolo[6,5,4-cd]indoles
已经研究了用于合成麦角酸类似物的新颖的自由基环化方法。由三正丁基锡氢化物介导的碳-溴键的均相裂解导致开发了一种通过单环化反应构建3,4-二取代的二氢吲哚的方法。经由双串联环化的六氢苯并[cd]吲哚和经由三自由基环化的八氢吲哚[6,5,4-cd]吲哚和十氢吲哚[4,3-fg]喹啉。由N-3- [3-(N-乙酰基-N-烯丙基氨基)-2-溴苯基] -5-(羰基甲氧基)-1生成的芳基的成功串联双5-exo-trig,6-endo-trig环化反应,4,5,6-四氢-N-甲基吡啶提供了甲基1-乙酰基-2,3,9,10-四氢丝氨酰。