Competing transformations of 2-cyanoacetanilides in the reactions with derivatives of ethoxymethylenemalonic acid
作者:Valeriya P. Tkachova、Nikolay Yu. Gorobets、Roman P. Tkachov、Vladimir I. Musatov、Vladimir D. Dyachenko
DOI:10.3998/ark.5550190.0013.635
日期:——
ile 1B and ethyl ethoxymethylenecyanoacetate 1C in cyclocondensations with 2-cyanoacetanilides 2 behave as a three-carbon fragment transfer reagent to afford the corresponding 5-cyano- and 5-ethoxycarbonyl-6-amino-1-aryl-3cyanopyridin-2(1H)-one derivatives 7B and 8C. One carbon transfer described earlier for such reactions with a use of diethyl 2-(ethoxymethylene)malonate 1A was observed only as a