Pummerer rearrangement of 1,3-oxathiolan-5-one S-oxides
Abstract
In their reaction with acetic anhydride, 2,2-dialkyl-1,3-oxathiolan-5-one S-oxides give by a highly stereoselective process the corresponding 4-acetoxy-2,2-dialkyl-1,3-oxathiolan-5-ones, in which the acetoxy-group is introduced on the side of the ring formerly occupied by the S-oxide bond.