<i>N</i>-Heterocyclic Carbene Catalyzed Transformations of 3-Halopropenals to the Equivalents of β-Acylvinyl Anions
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3-Halopropenals 1 can behave as an alternative equivalent of β-acylvinyl anions (I) in the presence of N-heterocyclic carbene precursor (IPr·HCl) and DBU to afford cyclic α,β-unsaturated carbonyl derivatives, butenolides 4 and pyrazolone 6, after cyclization with 2 and 5, respectively.
创建时间：
2010-02-05
