Allen-1,1-dicarboxamide durch Umallenierung von 1,3-Bis[dialkylamino]-1,3-diethoxyallenen mit disubstituierten Malonyl-chloriden
作者:R. W. Saalfrank、F. Schütz、U. Moenius
DOI:10.1055/s-1985-31430
日期:——
Allene-1,1-dicarboxamides by Transallenation of 1,3-Bis[dialkylamino]-1,3-diethoxyallenes with Disubstituted Malonyl Chlorides N,N,N′,N′-Tetrasubstituted malonic diamides are converted into 1,3-bis[dialkyl(aryl)-amino]-1,3-diethoxyallenes via a four-step O-ethylation - deprotonation - O-ethylation - deprotanation sequence using triethyloxonium tetrafluoroborate as ethylating agent. The 1,3-bis[dialkylamino]-1,3-diethoxyallenes thus prepared react with disubstituted malonyl chlorides to give N,N,N′,N′-tetraalkylallene-1,1-dicarboxamides.
通过 1,3-双[二烷基氨基]-1,3-二乙氧基烯与二取代丙二酰氯的反allenation 反应制备 1,3-双[二烷基氨基]-1,3-二乙氧基烯-1,1-二甲酰胺以四氟硼酸三乙氧基铵为乙化剂,通过 O-乙基化--去质子化--O-乙基化--去rotanation 四个步骤,将 1,3-双[二烷基(芳基)-氨基]-1,3-二乙氧基烯转化为丙二酰氯。由此制备的 1,3-双[二烷基氨基]-1,3-二乙氧基烯与二取代丙二酰氯反应,生成 N,N,N′,N′-四烷基烯-1,1-二羧酸。