Diisopropylethylamine → 1-(1-Tert-butoxycarbonylpiperidine-3-carbonyl)-piperidine-2-carboxylic acid [4-phenyl-1-(3-phenyl-propyl)-butyl]-amide

Participants

Reaction Steps

Piperidine-2-carboxylic acid [4-phenyl-1-(3-phenyl-propyl)-butyl]-amide (74) (1.00 g; 2.64 mmol) is dissolved in methylene chloride (25 mL) at ambient temperature. 1-tert-Butoxycarbonyl-piperidine-3-carboxylic acid (0.73 g; 3.17 mmol), N,N-diisopropylethylamine (0.75 g; 5.81 mmol) and PyBOP (1.65 g; 3.17 mmol) are added sequentially. The reaction is stirred for 19 hours at room temperature, then concentrated under reduced pressure. The residue is purified via silica gel chromatography (30%→50% ethyl acetate in hexanes) affording the desired product (81) as a solid. ESMS: MH+ 590.6

Provenance & Evidence