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Chiral crystals of the achiral 0x0 amide N,N-di-isopropylphenylglyoxylamide, prepared in large quantities, were irradiated in the solid state to give the optically active B-lactam 3-hydroxy-1 -isopropyl-4,4-dimethyl-3-phenylazetidin-2-one in high optical and chemical yields.

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Some Baeyer-Villiger oxidations of ketones with m-chloroperbenzoic acid proceed much faster in the solid state than in solution.Relatively few organic reactions have been carried out in the solid state.1 We have found that some Baeyer-Villiger oxidations of ketones with rn-chloroperbenzoic acid (1) proceed much faster in the solid state than in solution.