New regio-selective method of combinatorial synthesis of substituted thiophenes, thieno[3,2-b]pyridines and other heterocycles via combination of ‘domino’-type reactions
作者:Andrey A. Zubarev、Anatoliy M. Shestopalov、Natalia A. Larionova、Lyudmila A. Rodinovskaya、Alexander A. Shestopalov
DOI:10.1016/j.tet.2013.09.025
日期:2013.11
We present a novel combinatorial multicomponent regio-selective approach towards the synthesis of thieno[3,2-b]pyridines and pyridine pyrans. The methodology is based on the ‘domino’-type reaction. The high regio-selectivity in this reaction is gained by the in situ generation of the mono-potassium salt of 2-cyano-1-mercaptoethenethiolate. We also demonstrate that the use of ethyl 2-cyanoacetate in
我们提出了一个新颖的组合多组区域选择性方法向噻吩并[3,2-的合成b ]吡啶化合物和吡啶吡喃。该方法基于“多米诺”型反应。该反应中的高区域选择性是由原位生成2-氰基-1- mercaptoethenethiolate的单钾盐获得。我们还证明了在该反应中使用2-氰基乙酸乙酯作为CH-酸导致在Dieckmann缩合步骤终止多米诺序列,并产生了新颖的3-(4-cyano-3-hydroxy-5-(烷硫基)噻吩-2-基)-3-氧代丙酸酯。