β-Sulfonylation of α-bromoenals enabled by N-heterocyclic carbene catalysis
Literature Information
Shiyi Jin, Shuaishuai Fang, Rui Ma, Zheng Liang, Ye Xu, Tao Lu, Ding Du
An N-heterocyclic carbene (NHC)-catalyzed three-component tandem β-sulfonylation/esterification of α-bromoenals was developed. This protocol offers a simple and efficient pathway to access a wide range of functionalized alkyl sulfone esters that cannot be obtained through direct β-sulfonylation of internal α,β-unsaturated esters. The preference of β-sulfonylation over direct esterification of β-activated α,β-unsaturated acylazoliums and use of a weaker base were key to the success of this transformation.
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