Synthesis of 2-Oxazolidinones by Direct Condensation of 2-Aminoalcohols with Carbon Dioxide Using Chlorostannoxanes

Synthesis of 2-oxazolidinones from 2-aminoalcohols and carbon dioxide (CO2) in the presence of 1,3-dichloro-1,1,3,3-tetraalkyldistannoxanes (1) is reported. The influence of the change in substituent groups on the metal centers Sna and Snb of the catalyst (1) on the yields of the products was studied. Turnover numbers as high as 138 were obtained using the chlorostannoxane catalyst with all butyl substituents (1a) on both the metal centers. The activity of the catalyst 1a on various substrates was studied and reported.