Methyl acetoacetate → HCID 18370748, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of methyl acetoacetate [VI-2] (127.7 g, 1.1 mol) and methanol (200 g) is heated to 30° C. Thereto is added dropwise 28.1% solution of sodium methoxide in methanol (192 g, 1.0 mol), and the mixture is stirred for 1 hour. Thereto is added 1-bromo-5-chloropentane [V-1] (155.5 g, 0.838 mol), and the mixture is reacted at 70° C. for 2 hours. After completion of the reaction, the reaction mixture is concentrated under reduced pressure, and thereto is added toluene (500 g). The precipitated salt is removed by filtration. The toluene layer is washed with water and concentrated under reduced pressure to give methyl 7-chloro-2-(1-oxoethyl)heptanoate [II-2] (189.9 g, content; 88.7%, yield; 91.2%).

Provenance & Evidence