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
乙氧基亚甲基丙二腈 1B 和乙氧基亚甲基氰基乙酸乙酯 1C 在与 2-氰基乙酰苯胺 2 的环缩合反应中充当三碳片段转移试剂,得到相应的 5-氰基-和 5-乙氧基羰基-6-氨基-1-芳基-3氰基吡啶-2(1H)-一种衍生物 7B 和 8C。早先描述的使用 2-(乙氧基亚甲基)丙二酸二乙酯 1A 的此类反应的碳转移仅作为 1C 的副过程观察到,导致 2-氨基-5-氰基-6-氧代-N,1-二芳基-1,6-二氢吡啶-3甲酰胺。