RECEIVED hfAY 23, 1959-4 series of methyl-substituted pyrrolidines has been used to indicate the synthetic potentialities of the mercuric acetate oxidation of saturated tertiary amines containing a five-membered ring. The l,%, 1, 2, 5-, 1, 3, 4-and 1, 2, 2, 5-substituted pyrrolidines yield the corresponding A2-pyrrolines. In 1, 2, 2-trimethylpyrrolidine the double bond is introduced at the unsubstituted e-carbon, and the product is the dimer, l,~, 5- ...