FIELD: organic chemistry. SUBSTANCE: product: optically active cyclobutanone and its derivatives, gross-formula is C20H16O5, m. p. is 95.5-97 C. Reagent 1: dibenzoate ester(1S, 2R)-3,3-dimethoxy-1,2-cyclobutanedimethanol. Reagent 2: sulfuric acid. Reaction conditions: in the medium of acetonitrile, at 20-22 C. EFFECT: improved method of synthesis. 4 ex
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