Syntheses of Heterocycles with 5-Phenyl-isoxazolium Salts, III. Synthesis of Pyrroloquinazolin-5-ones

Article abstract of DOI:10.1007/BF00810284

Refluxing of ethanol-acetic acid solutions of N-aroyl-N-methyl-benzoylacetamides 3 causes elimination of acetophenone and generation of N(1)-substituted N(3)-methyl-1H,3H-quinazoline-2,4-diones 5.In contrast, at room temperature in acetanhydride 3 elimina