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Many α,α-difluoroketones such as 2S-(N-benzyloxycarbonyl-valinyl)amino-3-oxo-4,4-difluoro-1,6-diphenyl-hexane (1), with the strongly electronegative fluorines next to the carbonyl group, are usually fully hydrated. As a result of the hydration of the carbonyl group, the difluoroketones can act as transition-state analog inhibitors of certain proteinases. Reformatsky reaction of aldehydeN -t-butyloxycarbonyll...
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