Synthesis of pyrrolo[1,2-a]indoles by intramolecular heck reaction of N-(2-bromoaryl) enaminones
作者:Joseph P. Michael、Shih-Fang Chang、Clare Wilson
DOI:10.1016/s0040-4039(00)61432-6
日期:1993.12
Treatment of N-(2-bromoaryl) enaminones 4, prepared by several different methods, with palladium (II) acetate, triarylphosphine and triethylamine in boiling acetonitrile gave pyrrolo[1,2-a]indoles 8 yields of 50% – 100%. The hydroxy-substituted products 8k could be oxidised to the mitosene-like quinone 9 with Fremy's salt.
用几种不同方法制备的N-(2-溴芳基)烯胺酮4在沸腾的乙腈中用乙酸钯(II),三芳基膦和三乙胺处理,得到吡咯并[1,2- a ]吲哚8的收率为50%-100%。羟基取代的产物8k可以用弗雷米氏盐氧化成类似米托烯的醌9。
Pd(II)-catalyzed intramolecular aminopalladation/direct C–H arylation under aerobic conditions: synthesis of pyrrolo[1,2-a]indoles
作者:Tiffany Piou、Luc Neuville、Jieping Zhu
DOI:10.1016/j.tet.2013.01.003
日期:2013.6
Heating a DMA/pivalic acid (v/v=4/1) solution of diversely substituted 6-(phenylamino)hex-2-ynoates in the presence of a catalytic amount of Pd(OAc)(2) under oxygen atmosphere afforded pyrrolo[1,2-a]indoles in moderate to good yields. A domino sequence involving intramolecular aminopalladation followed by C-H activation and reductive elimination was proposed to account for the observed bis-cyclization. (C) 2013 Elsevier Ltd. All rights reserved.