Diisopropylethylamine → N-tert-Butoxycarbonyl-3-(3-pyridyl)alanine [4-phenyl-1-(3-phenyl-propyl)-butyl]-amide

Participants

Reaction Steps

N-tert-Butoxycarbonyl-3-(3-pyridyl)-alanine (1.00 g; 3.76 mmol) is dissolved in methylene chloride (25 mL) at ambient temperature. 1,7-Diphenyl-4-aminoheptane hydrochloride (1) (1.37 g; 4.51 mmol), N,N-diisopropylethylamine (1.55 g; 12.0 mmol) and PyBOP (2.34 g; 4.51 mmol) are added sequentially. The reaction is stirred for 2.5 hours at room temperature, then concentrated under reduced pressure. The residue is purified via silica gel chromatography (60%→80% ethyl acetate in hexanes) affording the desired product (84) as a solid. ESMS:MH+ 516.2

Provenance & Evidence