First one-pot organocatalytic synthesis of alpha-methylene-gamma-lactones

[摘要]：All in one pot: an organocatalytic highly enantioselective synthesis of alpha-methylene-gamma-lactones has been reported. The reaction between protected 2-hydroxymalonates and MBH carbonates is simply catalysed by chiral Lewis bases affording after acid treatment the corresponding lactones in excellent yields and enantioselectivities.

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