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 (CO 2 ) 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 Sn a and Sn b 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.