Cesium carbonate → HCID 86641746, compound

Participants

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 (0.2 M) was added 4-bromobutanenitrile (1.2 eq.) and cesium carbonate (1.3 eq.). The reaction was stirred at rt for 18 h, then heated to 65° C. for 4 h. After cooling to rt, the reaction was diluted with EtOAc. The aqueous layer was extracted with EtOAc. The combined organic extracts were washed with saturated aqueous NH4Cl solution, 5% aqueous HCl, saturated aqueous NaHCO3 solution, and brine. The organic solution was dried over MgSO4 and concentrated in vacuo to afford the title compound as an oil.

Provenance & Evidence