117194-86-2Relevant articles and documents
Sur le mecanisme de la Reaction de Meth-Cohn-Tarnowski de preparation des thiocoumarines
El-Ahmad, Youssef,Reynaud, Pierre
, p. 711 - 714 (2007/10/02)
Reaction of 2-t-butylthiobenzaldehyde with N-(2-dialkylaminoethyl)-cyanacetamides followed by heating of the resulting 3-(2-t-butylthiophenyl)-2-cyanoacrylamides in polyphosphoric acid leads to the formation of 3-carboxamido-2-imino-2H-benzothiopyrane intermediates which afford thiocoumarins on hydrolysis.The authors postulate the intermediate formation of a thiophenate ion by an electronic mechanism involving six centers.