Synthesis and some reactions of 3-substituted 10bH-oxazolo[3,2-c][1,3]benzoxazine-2(3H),5-diones
作者:H. Block、P. J. Faulkner
DOI:10.1039/j39710000329
日期:——
A simple two-stage synthesis of a number of 3-substituted 10bH-oxazolo[3,2-c][1,3]benzoxazine-2(3H),5-diones is described. These materials react with primary amines to form α-ureido-carboxamides, with concomitant elimination of a mixture of salicylaldehyde and the corresponding Schiff base with the primary amine. 3,5-Disubstituted hydantions are formed by alkaline hydrolysis of the ureido-carboxamides
描述了许多3-取代的10b H-恶唑并[3,2- c ] [1,3]苯并恶嗪-2(3 H),5-二酮的简单两步合成方法。这些物质与伯胺反应形成α-脲基羧酰胺,同时消除了水杨醛和相应的席夫碱与伯胺的混合物。3,5-二取代的氢化物是通过脲基-羧酰胺的碱水解而形成的。