Visible light-promoted synthesis of organic carbamates from carbon dioxide under catalyst- and additive-free conditions

摘要

An efficient and environmentally friendly method for the synthesis of organic carbamates from carbon dioxide has been developed via photolysis of alpha-aryldiazoesters under mild conditions in the absence of any catalysts and additives. By using different solvents, a four- or three-component coupling reaction involving aryldiazoesters, amines and carbon dioxide could occur rapidly and selectively, giving a variety of structurally diverse organic carbamates in moderate to high yields.

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