One-Pot Conversions of Olefins to Cyclic Carbonates and Secondary Allylic and Homoallylic Amines to Cyclic Carbamates

Sequential treatment of a 1,2-disubstituted olefin with m-CPBA, Br(3)CCO(2)H, and DBU results in the one-pot, stereospecific conversion of the olefin to the corresponding disubstituted cyclic carbonate (1,3-dioxolan-2-one) The reaction proceeds via an initial epoxidation followed by S(N)2-type epoxide ring opening by Br(3)CCO(2)H and subsequent base-promoted carbonate formation upon elimination of bromoform When a solution of a secondary allylic or homoallylic amine and Br(3)CCO(2)H is sequentially treated with m-CPBA then DBU, the product of the reaction is a cyclic carbamate (1,3-oxazolidin-2-one or 1,3-oxazinan-2-one)