(2S,5S,6S)-6-(3-allylphenyl)-5-methylpiperidine-2-carboxylic acid 、
(1S,3S)-2,3,4,9-tetrahydro-1-(3,4,5-trimethoxyphenyl)-1H-pyrido[3,4-b]indole-3-carboxylic acid 在
2,3,5-三甲基吡啶 、 N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以25%的产率得到(5aS,7S,8S,10aS,12S)-7-(3-Allyl-phenyl)-8-methyl-12-(3,4,5-trimethoxy-phenyl)-5,5a,8,9,10,10a,12,13-octahydro-7H-6a,11a,13-triaza-indeno[1,2-b]anthracene-6,11-dione