Michael addition of active methylene compounds to (Z)-2-arylidenebenzo[b]thiophen-3(2H)-ones
Abstract
A series of 2-amino-4-aryl-4H-1-benzothieno[3,2-b]pyran-3-carboxylates and 2-amino-4-aryl-3-cyano-4H-1-benzothieno[3,2-b]pyrans has been synthesized through Michael addition of (Z)-2-arylidenebenzo[b]thiophen-3(2H)-ones with active methylene compounds, such as ethyl cyanoacetate and malononitrile. Â The reaction was carried out in ethanol, in the presence of piperidine as a basic catalyst. Â The structures of the prepared compounds were determined by spectroscopic methods: Â 1H-NMR, 13C-NMR and confirmed by single crystal X-Ray diffraction.
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DOI: http://dx.doi.org/10.13171/mjc.4.1.2015.16.02.09.20/elyazidi
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