Ag(Ⅰ)/(ⁿC₇H₁₅)₄NBr-catalyzed reaction of ammonium carbamates and propargylic alcohols:Quantitative conversion of CO₂ into β-oxopropylcarbamates

A simple dual-component catalytic system, i.e., Ag(Ⅰ)/(ⁿC₇H₁₅)₄NBr was applied for the synthesis of various β-oxopropylcarbamates via dual-component coupling of ammonium carbamates and propargylic alcohols under atmospheric pressure.This simple method was proved to be a highly efficient system without the use of ligand, and capable of converting various propargylic alcohols and secondary amines into corresponding organic carbamates.Notably, quantitative conversion of CO₂ was achieved, thus improved the efficiency of CO₂ utilization.