3-Bromo-N-cyclohexylbenzamide synthesis

Yield:59507-55-0 95%

Reaction Conditions:

with triethylamine in dichloromethane at 20; for 2 h;

Steps:

163.1 Example 163 Preparation of 3-(3-aminopropyl)-o-cyclohexylbenzamide

Step 1:
A solution of 3-bromobenzoyl chloride (2.0 g, 9.1 mmol) in CH₂Cl₂ was added to a solution triethylamine (1.9 ml, 13.7 mmol) and cyclohexylamine (1.15 ml, 10.0 mmol) in CH₂Cl₂ at room temperature with stirring.
After 2 h, the mixture was washed with HCl (4N), brine, dried over Na₂SO₄ and concentrated under reduced pressure to give 3-bromo-N-cyclohexylbenzamide as a white solid.
Yield (2.43 g, 95%): ¹H NMR (400 MHz, CD₃OD) δ 8.29 (br s, 1H), 7.95 (t, J=2.0 Hz, 1H), 7.42-7.77 (m, 1H), 7.64-7.67 (m, 1H), 7.36 (t, J=8.0 Hz, 1H), 3.78-3.84 (m, 1H), 1.92-1.94 (m, 2H), 1.78-1.81 (m, 2H), 1.65-1.69 (m, 1H), 1.16-1.46 (m, 5H).

References:

US2016/193181,2016,A1 Location in patent:Paragraph 2079