The intramolecular cyclisation of aryl radicals onto a pyrrole is studied. The cyclisation allows the synthesis of either the spiropyrrolidinyloxindole or the pyrrolo[3,2-c]quinoline skeleton depending on the nature of the protecting group at the N-pyrrole atom. The regiochemistry of the cyclisation is not affected by the substituents on the benzene ring. Some limitations on the utility of tosylmethyl-isocyanide in pyrrole synthesis are also reported. (C) 2002 Elsevier Science Ltd. All rights reserved.
The intramolecular cyclisation of aryl radicals onto a pyrrole is studied. The cyclisation allows the synthesis of either the spiropyrrolidinyloxindole or the pyrrolo[3,2-c]quinoline skeleton depending on the nature of the protecting group at the N-pyrrole atom. The regiochemistry of the cyclisation is not affected by the substituents on the benzene ring. Some limitations on the utility of tosylmethyl-isocyanide in pyrrole synthesis are also reported. (C) 2002 Elsevier Science Ltd. All rights reserved.
Aryl radical cyclisation onto pyrroles: a divergent synthesis of spiropyrrolidinyloxindoles and pyrroloquinolines
作者:Carmen Escolano、Keith Jones
DOI:10.1016/s0040-4039(00)01588-4
日期:2000.11
The regiochemistry of cyclisation of an aryl radical on to a pyrrole is shown to depend on the N-substituent of the pyrrole. Changing this substituent allows the selective synthesis of either the spiropyrrolidinyloxindole or the pyrrolo[3,2-c]quinoline skeleton.
芳基自由基在吡咯上的环化的区域化学显示出依赖于吡咯的N-取代基。改变该取代基可选择性合成螺吡咯烷基亚基氧吲哚或吡咯并[3,2- c ]喹啉骨架。