Carbon tetrabromide → HCID 86716477, compound

A solution of carbon tetrabromide (51 mg, 0.15 mmol) in CH2Cl2 (5 mL) was stirred into a 0° C. solution of triphenylphosphine (48 mg, 0.18 mmol) and N1-n-butyl-N2(5-hydroxypentyl)oxalamide (30 mg, 0.130 mmol) in dry CH2Cl2 (5 mL) under an argon atmosphere. After 2 h, the reaction mixture was washed with water (5 mL), brine (10 mL), dried over anhydrous Na2SO4, and all volatiles were removed under reduced pressure. The residue was purified by SiO2 column chromatography using EtOAc/hexane (1:4) to give compound the title compound (32 mg, 84%) as a colorless solid, mp 109-110° C. TLC: 50% EtOAc/hexanes, Rf˜0.50; 1H NMR (300 MHz) δ 7.55 (br s, NH, 1H), 7.50 (br s, —NH, 1H), 3.40 (t, J=6.0 Hz, 2H), 3.25-3.35 (m, 4H), 1.80-1.85 (m, 2H), 1.40-1.60 (m, 6H), 1.25-1.35 (m, 2H), 0.92 (t, J=7.3 Hz, 3H); 13C NMR (100 MHz) δ 160.30, 160.15, 39.65, 33.65, 32.45, 31.40, 28.60, 25.60, 20.20, 13.90. HRMS calcd for C11H22BrN2O2 [M+1]+ 293.0865, found 293.0870.

1. washthe reaction mixture was washed with water (5 mL), brine (10 mL)
2. dry with materialdried over anhydrous Na2SO4
3. customall volatiles were removed under reduced pressure
4. customThe residue was purified by SiO2 column chromatography

ORD record

ord-29035bfe7c47474595e11fd2ccc574fc

Source dataset

uspto-grants-2016_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09422318B2