The reactions of some ethyl N- arylcarbamates and of the corresponding acetanilides towards 1 equiv. of N-hydroxymethylphthalimide in concentrated sulfuric acid at 50° have been compared with one another. In the case of certain para-substituted compounds, amidomethylation occurs more readily ortho to the carbamate group than to the N-acetyl group. The diagnostic use of (D6)benzene as a 1H n.m.r. solvent, particularly for the structural elucidation of the ortho-( phthalimidomethyl )- phenylcarbamates and -acetanilides, is reported. Acidic treatment of the ortho -( phthalimidomethyl ) phenylcarbamates, but not of the corresponding acetanilides, gave 8-substituted isoindolo [1,2-b]quinazolin-12(10H)-ones. Amidomethylation of the parent anilines is also described.
比较了一些 N-芳基氨基甲酸乙酯和相应的乙酰苯胺在 50°浓硫酸中与 1 等量的 N-羟甲基邻苯二甲酰亚胺的反应。在某些对位取代的化合物中,氨基甲酸酯基团比 N-乙酰基更容易发生酰胺甲基化。据报道,(D6)苯作为 1H n.m.r.溶剂的诊断用途,特别是用于阐明邻苯二甲酰亚胺甲基苯基氨基甲酸酯和乙酰苯胺的结构。酸性处理邻苯二甲酰亚胺甲基苯基氨基甲酸酯,但不处理相应的乙酰苯胺,可得到 8-取代的异吲哚并[1,2-b]喹唑啉-12(10H)-酮。此外,还介绍了母体苯胺的脒甲基化反应。