High stereoselectivity on low temperature Diels-Alder reactions

…, VL Júnior, MG Constantino…

文献索引：Gomes Constantino, Mauricio; Lacerda Jr., Valdemar; Da Silva, Gil Valdo Jose Molecules, 2002 , vol. 7, # 5 p. 456 - 464

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被引用次数: 20

摘要

Abstract We have found that some of the usually poor dienophiles (2-cycloenones) can undergo Diels-Alder reaction at-78 C with unusually high stereoselectivity in the presence of niobium pentachloride as a Lewis acid catalyst. A remarkable difference in reaction rates for