Vandenberghe, Didier M.; Hoornaert, Georges J., Bulletin des Societes Chimiques Belges, 1994, vol. 103, # 5-6, p. 185 - 186
作者:Vandenberghe, Didier M.、Hoornaert, Georges J.
DOI:——
日期:——
Intramolecular Diels-Alder reactions of 2(1H)-pyrazinones: Synthesis of new Furo/Pyrano-pyridinones and -pyridines
作者:Kris J. Buysens、Didier M. Vandenberghe、Suzanne M. Toppet、Georges J. Hoornaert
DOI:10.1016/0040-4020(95)00802-f
日期:1995.11
4-alkynyloxy side chain and 2(1H)-pyrazinones 9–10 carrying the corresponding 2- or 3-alkynyloxy(m)ethyl substituent are shown to undergo intramolecular Diels-Alder reaction. The formation of either fused pyridinones 13, 16, 20, 22 or 24 and/or pyridines 14, 17, 19 or 25 depends on the substitution pattern of the anchored pyrazinone and runs via the loss of either nitrile or isocyanate from the intermediate