Institution: | Laboratoire de Chimie organique 2, 38, Bd. Michelet, 44037 Nantes, France Département de Physique cristalline et Chimie structurale, E.R.A. au CNRS No. 015, Université de Rennes, 35031 Rennes, France |
Abstract: | The thioamide vinylogues (2-aminovinyl thioketones) react as heterodienes with open-chain and cyclic dienophiles to give substituted 4-amino-3,4-dihydro-2H-thiopyrans, or substituted 2H-thiopyrans and substituted 7 - methyl - 7,7a - dihydro - 5H - thiopyranno2,3 - c] - 5 - furanones respectively, in good agreement with calculated perturbation energy of second order. |