8b-trimethylcyclopent[b]-indole (I), the condensation product of 1,3-dimethylindole with hexane-2,5-dione, has been established by analysis of its PMR spectrum. The course of the reaction of I with concentrated hydrochloric acid is also elucidated.
1,3-二甲基吲哚与己烷-2的缩合产物3-乙酰基1,2,3,3a,4,8b-六氢-1,4,8b-三甲基环戊[ b ]-
吲哚的结构通过对其PMR光谱的分析已确定了5-二酮。还阐明了I与浓
盐酸的反应过程。