To a solution of (±)-cis-(2-methyl-1,2,3,4-tetrahydro-quinolin-4-yl)-carbamic acid benzyl ester (500 mg, 1.68 mmol) in methylene chloride (20 mL) at room temperature was added diisopropylethylamine (542 mg, 749 uL, 4.2 mmol) followed by 4-dimethylaminobenzoyl chloride and stirred at room temperature until no starting material was present. The mixture was poured into water and extracted with ethyl acetate. The extracts were washed with 1 M (aq) NaOH and brine, dried over sodium sulfate, filtered dried and concentrated. The crude residue was purified by silica gel chromatography (100% hexanes to 70% hexanes/30% ethyl acetate gradient) to afford the amide (665 mg, 89%).
