1015479-61-4Relevant articles and documents
A one-pot, ugi four-component synthesis of 2(3H)-oxazolone 4-carboxamides
García-Valverde,Macho,Marcaccini,Rodríguez,Rojo,Torroba
, p. 33 - 36 (2008/09/21)
Ugi reaction between arylglyoxals, anilines, cyclohexyl isocyanide and trichloroacetic acid in dichloromethane, in the presence of molecular sieves, afforded 2(3H)-oxazolone 4-carboxamides in good yields by a one-pot process that involved an in situ spontaneous cyclization of the Ugi product through an intermediate ketone enolate and the chloroacetate carbonyl group. The synthesis is based on the ability of the trichloroacetyl group to function as a masked carbonic acid surrogate. Georg Thieme Verlag Stuttgart.