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