New captodative polyheterofunctionalized cyclopentenones from 2,3,5-Trichloro-4,4-dimethoxy-5-(2-methylfuran-3-yl)cyclopent-2-en-1-one and secondary amines

2,3,5-Trichloro-4,4-dimethoxy-5-(2-methylfuran-3-yl)cyclopent-2-en-1-one reacted with secondary amines to give unusual Ad N E-substitution-fragmentation products, 5-[(1 Z ,2 E )-1-acetyl-3-dialkylaminoprop-2-en-1-ylidene]-3-dialkylamino-2-chloro-4,4-dimethoxycyclopent-2-en-1-ones.