Benzoyl chloride → HCID 10132608, compound

Participants

Reaction Steps

3.00 g 1-benzyl-N,N,N′-trimethyl-cyclohexane-1,4-diamine were dissolved in 50 ml methylene chloride, and 1.78 ml triethylamine and approx. 10 mg DMAP were added. 1.41 ml benzoyl chloride were added dropwise, while cooling in an ice/methanol bath, and the reaction mixture was then stirred overnight, while warming to room temperature. For working up, 50 ml five molar KOH solution and 50 ml water were added, the mixture was stirred for ten minutes and extracted three times with 50 ml methylene chloride each time, the combined extracts were dried over magnesium sulfate and filtered and the filtrate was concentrated. The crude product obtained (3.61 g) was chromatographed over silica gel with methanol/ether 1:1. 231 mg of the polar diastereomer of N-(4-benzyl-4-dimethylamino-cyclohexyl)-N-methyl-benzamide were obtained, from which 188 mg of the corresponding hydrochloride were prepared as described for example 1 with water and chlorotrimethylsilane in 2-butanone.

Provenance & Evidence