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。