作者:George Papageorgiou、John E.T. Corrie
DOI:10.1016/s0040-4020(97)00009-4
日期:1997.3
Carbamoyl derivatives of photolabile benzoins, particularly of 3′,5′-dimethoxybenzoin, are readily prepared via the mixed p-nitrophenyl carbonate of the benzoin. The method is most suitable for secondary amines, since many primary amines exist in varying proportions as the cyclic hydroxyoxazolidinone tautomer. In alkaline solution (0.2 M NaOH) the carbamates of unsymmetrical benzoins are readily equilibrated
光不稳定的安息香,特别是3',5'-二甲氧基安息香的氨基甲酰基衍生物可以通过安息香的混合对硝基苯基碳酸酯容易地制备。该方法最适合于仲胺,因为许多伯胺以不同的比例作为环状羟基恶唑烷酮互变异构体存在。在碱性溶液(0.2 M NaOH)中,不对称安息香的氨基甲酸酯很容易达到平衡。3',5'-二甲氧基苯偶姻氨基甲酸酯的快速光解会在快速杂解过程中生成氨基甲酸酯阴离子,胺的释放受脱羧速率的控制。