Acyl Cyanide. V. The Synthesis of 1-Cyano-1-alkenyl Esters by the Reaction of Acyl Cyanides with Acid Anhydrides and Isocyanates
作者:Akira Oku、Shigeru Nakaoji、Toshio Kadono、Hideki Imai
DOI:10.1246/bcsj.52.2966
日期:1979.10
The reactions of enolizable acyl cyanides (acetyl, propionyl, and isobutyryl cyanide) with acid anhydrides (acetic, propionic, butyric, isobutyric, and benzoic anhydride) in the presence of a catalytic amount of tertiary amines (pyridine, lutidines, 4-(dimethylamino)pyridine) produced the corresponding 1-cyano-1-alkenyl carboxylates. In the reactions of propionyl cyanide, (Z)-1-cyano-1-propenyl carboxylates
在催化量的叔胺(吡啶、二甲基吡啶、4-(二甲氨基)存在下,可烯醇化的酰基氰(乙酰、丙酰和异丁酰氰)与酸酐(乙酸、丙酸、丁酸、异丁酸和苯甲酸酐)的反应)吡啶)产生相应的1-氰基-1-烯基羧酸盐。在丙酰氰的反应中,(Z)-1-氰基-1-丙烯基羧酸盐主要在 (E)-异构体上形成(异构体比率 Z/E 约为 80/20)。氰化物与异氰酸酯的反应也以中等产率得到相应的 1-氰基-1-烯基氨基甲酸酯,1-氰基-2-甲基-1-丙烯基苯基氨基甲酸酯的酸处理诱导其退火成 3-苯基-1 ,3-恶唑烷-2,4-二酮衍生物。