Studies on 3-substituted 1,2-benzisoxazole derivatives. IV. Rearrangement of N-substituted 2H-1,2-benzisoxazolin-3-one to 2-substituted 2H-1,3-benzoxazin-4-one.
作者:HITOSHI UNO、MIKIO KUROKAWA
DOI:10.1248/cpb.26.549
日期:——
The base catalyzed ring expansion of 2-substituted 2H-1, 2-benzisoxazolin-3-one (3) to 2-substituted 2H-1, 3-benzoxazin-4-one (4) was observed during the alkylation of 3-hydroxy-1, 2-benzisoxazole (1).
在 3-羟基-1,2-苯并异噁唑(1)的烷基化过程中,观察到 2-取代的 2H-1,2-苯并异噁唑啉-3-酮(3)在碱催化下扩环为 2-取代的 2H-1,3-苯并异噁唑-4-酮(4)。