The reaction of ethyl N, Ndisubstituted carbamates with alcohols in the presence of the sodium alkoxide of the alcohol yields either carbamates or carbonates, apparently 1t8 a function of the relative base strengths of the disubstituted amine and the alkoxide. Thus, the reactions of isobutyl alcohol with ethyl N, N-diethyl-and N-ethyl-N-phenylcarbamates, and benzyl alcohol with ethyl N-ethyl-N-phenylcarbamate and N-N'-dicarbethoxypiperazine ...
