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1485mixture was poured into water and extracted with CH2Cl2. The layers were separated and the CHzClz layer was dried over sodium sulfate. Chromatography (SiO,; hexane-ether) gave a colorless oil: 31 mg (26%); NMR 1.90 (m, 2 H, CHJ, 2.33 (s,4 H, COCHJ, 2.90 (m, 4 H, benzylic), 7.20 (s, 4 H, aromatic); IR 3525 (6 H), 1710 (c=O), 1600 (aromatic); mass spectrum, m l e 190 ( M ' ) , 147This compound was further identified by the preparation of its semicarbazone. 2-Acetyl-2-hydroxy-l,2,3,4-tetrahydronaphthalene (30 mg, 0.16 mmol) was added to a mixture of semicarbazide hydrochloride (150 mg, 1.05 "01) and sodium acetate