作者:V. Balasubramaniyan、N.P. Argade
DOI:10.1016/0040-4020(89)80114-0
日期:1989.1
acetate-acetic anhydride underwent double cyclisation leading to pyrrolobenzoxazinones Va-g carrying an angular acetate. A one-flask reaction of dimethylmaleic anhydride and phthalic anhydride with anthranilic acid furnished the angular hydroxy benzoxazinones IVh and IVi respectively, which were converted to the corresponding acetates Vh and Vi. The acetates Va, Vc, Vf, Vg and Vi underwent solvolysis to the
当用乙酸钠-乙酸酐处理时,邻-羧基马来酸IIIa-g经历双环化,从而导致吡咯并苯并恶嗪酮Va-g携带乙酸乙酸酯。二甲基马来酸酐和邻苯二甲酸酐与邻氨基苯甲酸的一烧瓶反应分别提供了角羟基苯并恶嗪酮IVh和IVi,将其转化为相应的乙酸酯Vh和Vi。在与无水甲醇回流下,乙酸酯Va,Vc,Vf,Vg和Vi进行溶剂分解为相应的甲基醚(VII)。