Methylene-indolines, indolenines and indoleniniums, XXII the fischer indolization of some substituted cyclopentanones
作者:Jean-Yves Laronze、Rachida El Boukili、Daniel Royer、Jean Lévy
DOI:10.1016/s0040-4020(01)80957-1
日期:1991.1
When submitted to the acidic conditions of the Fischer indolization reaction, the phenylhydrazone of 2,5-dimethylcyclopentanone 1 did not give the expected indolenine 1c, but carbinolamines 1d. Depending on the substitution pattern of the aromatic ring, or that of the cyclopentanone, dimers 3j, 4j, ketone 3e, or compounds 5m and 5n resulting from the cleavage of the cyctopentane ring were obtained
当置于费歇尔吲哚化反应的酸性条件下时,2,5-二甲基环戊酮1的苯hydr不会生成预期的吲哚烯1c,而会生成甲醇胺1d。取决于芳环或环戊酮的取代模式,获得了由于环戊烷环的裂解而形成的二聚体3j,4j,酮3e或化合物5m和5n。反应混合物的NaBH 3 CN还原主要产生二氢吲哚,如1f。