210489-24-0Relevant articles and documents
Cyclization of phenacyl 2-{[2,2-di(ethoxycarbonyl)-vinyl]amino}benzoate
Hradil, Pavel,Kvapil, Lubomir,Hlavac, Jan,Lemr, Karel,Sevcik, Juraj
, p. 520 - 524 (1998)
Reaction of phenacyl anthranilate (1) with diethyl (ethoxymethylidene)malonate afforded phenacyl 2-{[2.2-di(ethoxycarbonyl)vinyl]amino}benzoate (2) which on heating in polyphosphoric acid underwent degradation. Thermal cyclization of 2 in diphenyl ether g