Gong Fu-chun
2010
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Journal
Fine Chemical Intermediates
Abstract
A new route for the synthesis of 1-(2',2'-Diethoxycarbonylethyl)-1-ethyl-1,2,3,4,6,7,12,12boctahydroindolo [2,3-a]quinolizine,a key intermediate for vinpocetine,from Wenkert's enamine was established with catalyst load,reaction temperature and reaction time of 5.1%,85℃ and 7 h,respectively.The yield of the product was 85.5%.The product structure was identified with FTIR,MS and NMR.