Pyridine → HCID 59803164, compound

Temperature

40 °C

To a solution of 3-bromo-4-chlorobenzoic acid 71 (5.30 g, 23 mmol) in DCM (10 mL) at room temperature was added DMF (5 drops) and oxalyl dichloride (3.0 mL, 34 mmol). The reaction mixture was heated to 40° C. for 1 h. The solvent and excess oxalyl chloride were removed under a stream of nitrogen followed by high vacuum. The acid chloride was dissolved in DCM (100 mL), cooled to 0° C., and then pyridine (2.8 mL, 34 mmol) was added followed by (R)-1-phenylethanamine (3.8 mL, 30 mmol). The reaction mixture was stirred at 0° C. for 1 h and concentrated under reduced pressure. The crude amide was dissolved in EtOAc, washed with 1 M HCl (2×), brine (1×), dried over MgSO4, filtered, and concentrated to give (R)-3-bromo-4-chloro-N-(1-phenylethyl)benzamide 72 (8.15 g, 71% yield) as a white solid which was used without further purification. Mass spectrum: calculated for C15H13BrClNO 337.0. found 338.0 (M++1).

1. customThe solvent and excess oxalyl chloride were removed under a stream of nitrogen
2. dissolutionThe acid chloride was dissolved in DCM (100 mL)
3. temperaturecooled to 0° C.
4. concentrationconcentrated under reduced pressure
5. dissolutionThe crude amide was dissolved in EtOAc
6. washwashed with 1 M HCl (2×), brine (1×)
7. dry with materialdried over MgSO4
8. filtrationfiltered
9. concentrationconcentrated

ORD record

ord-0a4185b810c64c0d931090313a24fa84

Source dataset

uspto-grants-2013_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08349831B2