Syntheses of 2,3-dicyano-5a,8a-dihydro-5a-hydroxycyclopentano[1',2':4,5]pyrrolo[2,3-b]pyra zines and 2,3-dicyanocyclohexano[1',2':4,5]pyrrolo[2,3-b]pyrazines

Article abstract of DOI:10.1002/jhet.5570370546

Previously synthesized 2-(3'-chloro-5',6'-dicyanopyrazin-2'-yl)cyclopentan-1-one 1, obtained from the reaction of 2,3-dichloro-5,6-dicyanopyrazine with 1-pyrrolidino-1-cyclopentene, was further reacted with primary alkylamines to give mixtures of diastere