of potassium 2-pyridinylsulfonyldifluoroacetate and its subsequent reaction with aldehydes was found to be an efficient approach for the Julia–Kocienski reaction under mild conditions to give gem-difluoro olefins in moderate to excellent yields. Owing to its high stability in the pure state and its easy decarboxylation in polar solvents, potassium 2-pyridinylsulfonyldifluoroacetate is expected to