Phthalimides. I. Base-catalyzed Lossen Rearrangement and Acid-catalyzed Beckmann Rearrangement with<i>N</i>-(Arylsulfonyloxy)phthalimides
作者:A. F. M. Fahmy、N. F. Aly、A. Nada、N. Y. Aly
DOI:10.1246/bcsj.50.2678
日期:1977.10
N-(Arylsulfonyloxy)phthalimides undergo base-catalyzed Lossen rearrangement with amines, and amino acids to give N,N′-diaryl ureas and amine salts. They behave similarly with phenylhydrazine in alcohol to give a mixture of N-hydroxyphthalimide and phenylhydrazine salts. However, N-(arylsulfonyloxy)phthalimides undergo isomerization followed by Beckmann rearrangement to give a mixture of 4-aryl-1H-2,3-benzoxazin-1-ones
N-(芳基磺酰氧基)邻苯二甲酰亚胺与胺和氨基酸进行碱催化的洛森重排,得到 N,N'-二芳基脲和胺盐。它们与苯肼在醇中的行为相似,得到 N-羟基邻苯二甲酰亚胺和苯肼盐的混合物。然而,N-(芳基磺酰氧基)邻苯二甲酰亚胺经过异构化,然后进行贝克曼重排,得到 4-芳基-1H-2,3-苯并恶嗪-1-酮和二芳基砜的混合物。