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