The acid-catalyzed reaction of pyrrole and acetone yields “acetonepyrrole,” CSH~~ N~.~ A structure has been proposed by Chelintzev and Tronov (I) 2d and given the name a, P, yJ- octamethylporphinogen by F i~ cher.~ This configuration is based on the isolation of maleimide by oxidation with chromic acid3d and pyrrole and 2-isopropylpyrrole by a pyrolytic reaction. 2b The uncertainty of the linkage of the bridge carbons to the pyrrole ...
