Dimethylformamide dimethyl acetal → HCID 67435184, compound

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Reaction Steps

A mixture of crude 1-(2-chlorophenyl)butane-1,3-dione from the previous step and 1,1-dimethoxy-N,N-dimethylmethanamine (2.042 g, 17.14 mmol) in toluene (20 mL) was heated to reflux for 2 h and concentrated. Silica gel chromatography, using 70 to 100% ethyl acetate in hexanes gradient, gave 1-(2-chlorophenyl)-2-((dimethylamino)methylene)butane-1,3-dione as a red, viscous oil (2.20 g, 51% yield for 2 steps). MS (ES+) m/z: 252 (M+H); HPLC retention time: 2.51 min (Analytical HPLC Method D).

Provenance & Evidence