ONE STEP PROCESS FOR SYNTHESIS OF CYCLIC CARBONATES

摘要

This invention discloses one step transition metal free process for synthesis of cyclic carbonates from aldehydes and carbon dioxide. More particularly, the invention relates to single step procedure involving Corey-Chaykovsky reaction and in-situ CO2 insertion.

主权项

1. One step transition metal free process for the synthesis of cyclic carbonates of formula I from an aldehyde of formula II and Corey-Chaykovsky reagent in presence of carbon dioxide comprising: a. adding a solvent to NaH followed by stirring under nitrogen at temperature ranging between 0-35° C. for a period ranging between 0.5 to 1 hrs to obtain a slurry; b. adding Corey Chaykovsky reagent to the slurry of step (a) to obtain a homogeneous solution; c. adding aldehyde of formula H slowly to homogenous mixture of step (b) followed by bubbling CO2 gas into the reaction mixture with stirring at temperature ranging between 40 to 60° C. for a period ranging between 6 to 8 hrs to obtain cyclic carbonate of formula I.