Bromotrichloromethane → HCID 18517860, compound

Participants

Reaction Conditions

Reaction Steps

A solution comprised of methyl 2-[2-(2-benzyloxycarbonylamino-4-methylvalerylamino)-1-hydroxy-4-phenylbutyl]-4,5-dihydrooxazole-4-carboxylate (0.036 g, 0.067 mmol) in methylene chloride (3 mL) was cooled to 0° C. and then DBU (11.2 mg, 72.7 μmol) and bromotrichloromethane (14.6 mg, 73.7 μmol) were added. The mixture was stirred for 6 hours at room temperature and concentrated. The residue was dissolved in ethyl acetate (20 mL) and the solution was dried (MgSO4) and concentrated. The product was purified from the residue by flash chromatography eluting with 1:3 hexanes/ethyl acetate to provide methyl 2-[2-(2-benzyloxycarbonylamino-4-methylvalerylamino)-1-hydroxy-4-phenylbutyl]oxazole-4-carboxylate (12 mg, 0.022 mmol) as a white solid. MS(PCI) m/z=538 (M+1) 1H NMR (CDCl3): δ 0.8-1.05 (d, J=4 Hz, 6H), δ 1.55-1.70 (m, 3H), δ 2.00 (m, 1H), δ 2.40 (m, 1H), δ 2.69 (m, 2H), δ 3.99 (m, 3H) 4.45 (m, 1H), δ 5.17 (s, 2H), δ 5.78 (m, 1H, δ 7.01 (d, J=4 Hz 1H), δ 7.14-7.47 (m, 10H) 7.72(d, J=4 Hz, 1H), δ 8.40 (s, 1H). (C29H35N3O7).

Provenance & Evidence