Mechanisms of cyclisation of indolo oxime ethers. Part 2: Formation of ethyl 6,8-dimethoxypyrazolo[4,5,1-hi]indole-5-carboxylates
作者:Kylie A. Clayton、David StC. Black、Jason B. Harper
DOI:10.1016/j.tet.2008.01.100
日期:2008.3
The cyclisation of a series of ethyl 3′-phenyl-4′,6′-dimethoxyindol-7′-yl-2-(hydroxyimino)acetates was investigated using 1H NMR spectroscopy to determine the mechanism of formation of the corresponding ethyl 6,8-dimethoxypyrazolo[4,5,1-hi]indole-5-carboxylates. The electronic requirements of the reaction were determined and used, along with the effect of removing the ester functionality, to determine
使用1 H NMR光谱研究了一系列3'-苯基-4',6'-二甲氧基吲哚-7'-基-2-(羟基亚氨基)乙酸乙酯的环化反应,以确定相应的乙基6的形成机理, 8-二甲氧基吡唑并[4,5,1- hi ]吲哚-5-羧酸酯。确定并使用反应的电子要求,以及去除酯官能团的作用,以确定反应通过一致的分子内取代进行。