Enantioselective Synthesis of β,γ-Unsaturated α-Fluoroesters Catalyzed by N-Heterocyclic Carbenes
作者:Yu-Ming Zhao、Man Sing Cheung、Zhenyang Lin、Jianwei Sun
DOI:10.1002/anie.201204521
日期:2012.10.8
NHC meets F: NHC‐bound enolates undergo a catalytic asymmetric fluorination reaction to β,γ‐unsaturated α‐fluoroesters, which are obtained with good efficiency and stereoselectivity (see scheme, NFSI=N‐fluorobenzenesulfonimide). The strategy overcomes possible challenges, such as fluorination in the γ position and difluorination. Experimental evidence combined with DFT calculations provides insight
NHC符合F:NHC结合的烯酸酯会与β,γ-不饱和α-氟代酯发生催化不对称氟化反应,从而获得良好的效率和立体选择性(参见方案,NFSI = N-氟代苯磺酰亚胺)。该策略克服了可能的挑战,例如γ位置的氟化和二氟化。实验证据与DFT计算相结合,可以深入了解反应机理。