Thermal decomposition of 1,3-diaryl-1-nitrosoureas in benzene.
作者:MAKOTO MIYAHARA、SHOZO KAMIYA
DOI:10.1248/cpb.30.3466
日期:——
Thermal decomposition of several 1, 3-diaryl-1-nitrosoureas (Ia-e) in benzene gave denitrosated 1, 3-diarylureas (IIa-e), benzene derivatives (IIIa-e), biphenyls (IVa-e) and newly formed 1, 3-diarylureas (Va-e). Based on these results, pathways of the decomposition are proposed. Compounds Ia-e rearrange to the corresponding arylazo arylcarbamates (VIa-e), which decompose to give such intermediates as diazonium ions (VIIa-e), arylcarbamate anions (VIIIa-e) and aryl isocyanates (IXa-e). These intermediates further react with the solvent or other species to give the final products. The existence of these intermediates was confirmed by chemical and spectral studies.
几种1, 3-二芳基-1-亚硝脲(Ia-e)在苯中热分解,生成去亚硝基化的1, 3-二芳基尿素(IIa-e)、苯衍生物(IIIa-e)、联苯(IVa-e)和新形成的1, 3-二芳基尿素(Va-e)。基于这些结果,提出了分解路径。化合物Ia-e重排为相应的芳基偶氮芳基氨基甲酸酯(VIa-e),随后分解产生偶氮离子(VIIa-e)、芳基氨基甲酸酯阴离子(VIIIa-e)和芳基异氰酸酯(IXa-e)等中间体。这些中间体进一步与溶剂或其他物质反应,生成最终产品。这些中间体的存在通过化学和光谱研究得到了确认。