Synthesis of α-alkylidene cyclic carbonates via CO2 fixation under ambient conditions promoted by an easily available silver carbamate.

The simple and cost-effective compound [Ag(O₂CNEt₂)], in combination with PPh₃, works as an effective catalytic precursor in the carboxylation of propargyl alcohols at ambient temperature and atmospheric CO₂ pressure, and in most cases under solventless conditions. The silver carbamate revealed a better performance than commercial silver oxide, Ag₂O, and allowed to obtain a series of α-alkylidene cyclic carbonates in high yields. [ABSTRACT FROM AUTHOR]