Triethylamine → (R)-3-((S)-1-hydroxy-5-methoxy-1-phenylpentyl)piperidine-1-carbonyl chloride

Participants

Reaction Conditions

Reaction Steps

A solution of (S)-5-methoxy-1-phenyl-1-((R)-piperidin-3-yl)pentan-1-ol (455.6 mg, 1.8 mmol) and triethylamine (1.50 mL, 10.7 mmol) in CH2Cl2 (100 mL) was cooled to 0° C. A solution of triphosgene (278.6 mg, 1.0 mmol) in CH2Cl2 (10 mL) was added with fast dropwise addition. The solution was stirred for 30 min at 0° C. and then for 2 h at rt. The reaction mixture was cooled to 0° C., washed with ice-cold satd aq NaHCO3 (3×10 mL) and ice-cold brine (3×10 mL), dried (Na2SO4), decanted, and stripped to afford (R)-3-((S)-1-hydroxy-5-methoxy-1-phenylpentyl)piperidine-1-carbonyl chloride (540.8 mg, 99%) as a yellow oil. This material was carried on directly to the next step.

Provenance & Evidence