Two isomers each of% methyl-, 2, 5-dimethyl-and 1, 2, 5-trimethylpyrroline have been prepared and chaiacterized, and their structures have been established. Each pair of isomers differs only in the position of the double bond in the ring, and in one case &e direct conversion of one isomer to the other has been demonstrated. The reduction of homologs of pyrrole with zinc and hydrochloric acid may lead to a mixture of pyrrolines containing the ...
