Potassium Carbonate → 4-Amino-5-chloro-N-(2-diethylamino-ethyl)-2-(2-oxo-cyclohexyloxy)-benzamide

Participants

Reaction Steps

A mixture of 4-amino-5-chloro-N-[2-(diethylamino)-ethyl]-2-hydroxybenzamide hydrochloride (15 g, 47 mmoles) (from Preparation 1A), tetrabutylammonium bromide (15 g, 47 mmoles), anhydrous potassium carbonate (34.32 g, 0.234 mole), 2-chlorocyclohexanone (8.9 g, 67 mmoles) in DMF (60 ml) was stirred for 4 days. The reaction mixture was partitioned between water and ethyl acetate. The ethyl acetate solution was washed with 0.4N NaOH, water and extracted with 1N HCl (50 ml). The acid extract was basified with saturated sodium carbonate solution and extracted with methylene chloride. The extract was dried and filtered through silica, the filtrate was concentrated and the concentrate diluted with pentane. The oiled-out material solidified on standing and was crystallized from toluene (30 ml) to yield the title compound, mp. 96°-99°.

Provenance & Evidence