Visible-light photocatalyzed oxidative decarboxylation of oxamic acids: a green route to urethanes and ureas
作者:Govind Goroba Pawar、Frédéric Robert、Etienne Grau、Henri Cramail、Yannick Landais
DOI:10.1039/c8cc05462b
日期:——
based on a photocatalyzed oxidative decarboxylation of oxamic acids is described. The reaction includes in situ generation of an isocyanate from the oxamic acid, using an organic dye as a photocatalyst, a hypervalent iodine reagent as an oxidant and a light source, which trigger the free-radical decarboxylation. This protocol successfully avoids the isolation, purification and storage of carcinogenic
描述了基于光催化的肟酸的氧化脱羧,可持续的无金属途径生产氨基甲酸酯和尿素的方法。该反应包括使用有机染料作为光催化剂,高价碘试剂作为氧化剂和光源从草酰胺酸原位生成异氰酸酯,从而触发自由基脱羧。该方案成功地避免了致癌的异氰酸酯的分离,纯化和储存,并允许通过一锅法从可商购的来源精制氨基甲酸乙酯和尿素。