Facile Synthesis of [1,2,3]-Triazole-Fused Isoindolines, Tetrahydroisoquinolines, Benzoazepines and Benzoazocines by Palladium-Copper Catalysed Heterocyclisation
摘要:
An elegant method for the synthesis of 1,2,3-triazoles fused with five-, six-, seven- and eight-membered benzoheterocycles, including isoindoline, tetrahydroisoquinoline, benzoazepine and benzoazocine, has been developed via palladium-copper catalysed reactions in one-pot. The broad scope of this reaction was illustrated by effecting bis-heteroannulations, synthesis of uracil derivatives of biological interest, and employment of acetylene gas as an inexpensive substrate. The reactions are experimentally simple and utilise easily accessible substrates of different types.
An easy access to 4-(1,2,3-triazolylalkyl)-1,2,3-triazole-fused dihydroisoquinolines and dihydroisoindoles
作者:Vito Fiandanese、Isabella Marino、Angela Punzi
DOI:10.1016/j.tet.2012.10.005
日期:2012.12
A convenient synthesis of 4-(1,2,3-triazolylalkyl)-1,2,3-triazole fused dihydroisoquinolines and dihydroisoindoles is reported, starting from easily available (2-iodoaryl)alkyl azides and terminal alkynols. The procedure is based upon transition-metal catalyzed coupling reactions followed by iterative cycloaddition reactions.
An easy synthetic approach to 1,2,3-triazole-fused heterocycles
作者:Vito Fiandanese、Giuseppe Marchese、Angela Punzi、Francesco Iannone、Giacomo G. Rafaschieri
DOI:10.1016/j.tet.2010.09.068
日期:2010.11
A convenient synthesis of 1,2,3-triazole-fused isoindolines and dihydroisoquinolines in good to excellent yield is reported, starting from easily available terminal alkynes and (2-haloaryl)alkylazides. The method is based upon a cycloaddition reaction, via click chemistry, followed by a transition metal-catalyzed functionalization of a C-H bond. (C) 2010 Elsevier Ltd. All rights reserved.