ABSTRACT A metal‐free, efficient method for the simple and convenient synthesis of aryl group‐substituted thiocarbonates under ambient conditions has been developed. The described strategy enabled the practical approach to access diaryl‐substituted cyclic thiocarbonates from hydrobenzoin using di(1 H ‐imidazol‐1‐yl)methanethione (Im 2 CS) in toluene at reflux. N ‐Heterocyclic carbene (NHCs) have been used as organocatalysts to convert functionalized aromatic aldehydes to substituted benzoin, which is then rapidly reduced with commercially available sodium borohydride (NaBH 4 ) in one‐pot conditions, producing functionalized hydrobenzoin derivatives in good yields. The present method offers a greener approach featuring readily accessible catalysts and reagents, broad substrate scope, operational simplicity, high yields, shorter reaction times, and mild conditions.
Solanke et al. (Thu,) studied this question.