Cyclization of Cyanoethylated Ketones as a Route to 6-Substituted Indole Derivatives
作者:Jan Bergman、Birgitta Stensland
DOI:10.1002/jhet.2048
日期:2014.1
δ‐Cyanoketones are quickly cyclized with KOtBu to 3‐aminocyclohex‐2‐enone derivatives, which in turn will give substituted indoles when treated with oxalyl chloride. Thus, 3‐amino‐6,6‐dimethylcyclohex‐2‐enone gave 3‐chloro‐6,6‐dimethyl‐2,5,6,7‐tetrahydroindole‐2,5‐dione, whose structure was corroborated by X‐ray crystallography, whereas the corresponding molecule without the blocking gem‐dimethyl groups
δ-氰基酮可通过KOtBu快速环化成3-氨基环己-2-烯酮衍生物,当用草酰氯处理时,它们会生成取代的吲哚。因此,3-氨基-6,6-二甲基环己-2-烯酮产生了3-氯-6,6-二甲基-2,5,6,7-四氢吲哚-2,5-二酮,其结构得到了X射线的证实。晶体学,而没有封闭的二甲基-二甲基基团的相应分子3-氨基环己-2-烯酮通过氢转移得到6-氯-3-羟基羟吲哚。