2-Dimethylaminopyridine → 2-(3-Ethynyl-quinolin-6-yloxy)-2-methoxy-n-(2-methoxy-1,1-dimethyl-ethyl)-acetamide

Participants

Reaction Steps

To a solution of (3-ethynyl-quinolin-6-yloxy)-metoxy-acetic acid (150 mg) in dry dimethylformamide (7 mL) were added 2-metoxy-1,1-dimethyl-ethylamine hydrochloride (81 mg) N-ethyldiisopropylamine (0.25 mL), dimethylaminopyridine (catalytic quantity) and (benzotriazol-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate (297 mg). The reaction mixture was stirred at room temperature for 18 hours. The mixture was poured over brine and extracted twice with ethyl acetate (thrice). The organic layer was washed with water then with brine, dried over sodium sulphate, filtered and concentrated under reduced pressure. The crude was purified by chromatography eluting with cyclohexane/ethyl acetate (7:3 by volume), to give 2-(3-ethynyl-quinolin-6-yloxy)-2-methoxy-N-(2-methoxy-1,1-dimethyl-ethyl)-acetamide (172 mg) as an oil.

Provenance & Evidence