Dimethylformamide → Benzamide

A mixture comprised of 2R-benzoylamino-3-benzylsulfanylpropionic acid (0.508 g, 1.61 mmol), aminoacetonitrile hydrochloride (0.149 g, 1.61 mmol), PyBOP® (0.838 g, 1.61 mmol), N,N-diisopropylethylamine (0.84 mL, 4.83 mmol) and DMF (10 mL) was stirred at room temperature for 2.5 hours. The mixture was concentrated and the residue was taken up into dichloromethane. The dichloromethane mixture was washed with 1N hydrochloric acid, water and aqueous sodium bicarbonate, dried (MgSO4), filtered and concentrated. Product was purified from the residue by silica gel chromatography using 5% methanol in dichloromethane to provide N-(2-benzylsulfanyl-1R-cyanomethylcarbamoyl)ethyl)benzamide (541 mg, 1.53 mmol) as an oil. MS: m/e 353.8 (theory 353.1); Proton NMR Spectrum (DMSO-d6): δ 8.85 (t, 1H), δ 8.75 (d, 1H), δ 7.99 (d, 2H), 7.5 (m, 3H), δ 7.3 (m, 5H), δ 4.7 (m, 1H), δ 4.15 (d, 2H), δ 3.75 (s, 2H), δ 2.8 (m, 2H) ppm.

1. concentrationThe mixture was concentrated
2. washThe dichloromethane mixture was washed with 1N hydrochloric acid, water and aqueous sodium bicarbonate
3. dry with materialdried (MgSO4)
4. filtrationfiltered
5. concentrationconcentrated
6. customProduct was purified from the residue by silica gel chromatography

ORD record

ord-5b33da749abb45f8b01f0b6a80cfa11c

Source dataset

uspto-grants-2002_09

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06455502B1