Cesium carbonate → HCID 66721121, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 2 g (4.88 mmol) of methyl 3,5-dichloro-2′-(4-chloro-3-hydroxyphenyl)-2,3′-bipyridine-6′-carboxylate in 20 mL of anhydrous DMF placed under argon are added 1.15 g (7.32 mmol) of 3-chloro-N,N-dimethylpropane-1-amine hydrochloride and 4.77 g (14.64 mmol) of cesium carbonate. The reaction medium is stirred for 18 hours at 90° C., cooled to room temperature and then concentrated under reduced pressure. The residue is taken up in 250 mL of EtOAc and washed with 250 mL of aqueous 5% Na2CO3 solution and then with 100 mL of water. After drying over Na2SO4 and concentrating under reduced pressure, the residue is purified by chromatography on a column of silica gel, eluting with a DCM/methanol gradient of from 0 to 15% methanol. After concentrating under reduced pressure, 1.82 g of methyl 3,5-dichloro-2′-{4-chloro-3-[3-(dimethylamino)propoxy]phenyl}-2,3′-bipyridine-6′-carboxylate is obtained in the form of a gum.

Provenance & Evidence