Bulbule, Vivek J.; Deshpande, Vishnu H.; Bedekar, Ashutosh V., Journal of Chemical Research - Part S, 2000, # 5, p. 220 - 221
作者:Bulbule, Vivek J.、Deshpande, Vishnu H.、Bedekar, Ashutosh V.
DOI:——
日期:——
Niobium Pentachloride Activation of Enone Derivatives: Diels-Alder and Conjugate Addition Products
作者:Mauricio Constantino、Valdemar Júnior、Gil Da Silva
DOI:10.3390/70500456
日期:——
Niobium pentachloride has proven to be a powerful activating agent for Diels-Alder or conjugate addition reactions of cycloenones. The Diels-Alder product was obtained only with an unsubstituted enone (cyclohexenone) and the highly reactive diene cyclopentadiene; substituents in the β-position of enones seem to prevent Diels-Alder reaction: oxygenated substituents favor the formation of vinyl chlorides