Cesium carbonate → HCID 86641748, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of tert-butyl (3R,4S)-3-({cyclopropyl[3-hydroxy-5-(3-methoxy-propyl)benzyl]amino}carbonyl)-4-{4-[2-(2,6-dichloro-4-methylphenoxy)ethoxy]-phenyl}piperidine-1-carboxylate (1 eq.) from Example 1/Step 2 in DMF (0.05 M) was added methyl 4-(bromomethyl)benzoate (1.6 eq.) and cesium carbonate (1.3 eq.). The reaction was heated to 80° C. and stirred for 12 h. After cooling to rt, the reaction was diluted with ether and quenched with water. The aqueous layer was extracted with ether. The combined organic extracts were washed with water, brine, dried over MgSO4, and concentrated in vacuo. The crude product was purified by flash column chromatography (SiO2, 5% EtOAc in Hex→100% EtOAc) to afford the title compound as a foam.

Provenance & Evidence