Benzyl Chloride → Benzyl 4-methyl-2-oxopentanoate

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A mixture of 2-Oxo-4-methyl pentanoic acid sodium salt (10 g, 65.7 mmol) and benzyl chloride (8 g, 63 mmol) in 300 ml DMF was stirred at 40°-50° C. for 5 h. It was filtered, and the filtrate was evaporated under reduced pressure to provide an oil. The oil was dissolved in chloroform, washed with water, dried, filtered, and evaporated to provide the desired product (13 g, 94%). 1H NMR (CDCl3, TMS) δ0.95 (d,6H), 2.15 (m,1H), 2.7 (d,2H), 5.28 (s,2H), 7.4 (m,5H). Mass spectrum: (M+H)+ =221.

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