(1,1'-Biphenyl)-3-carboxylic acid → HCID 67214341, compound

Participants

Reaction Steps

Oxalyl chloride (132 μL, 1.5 mmol) was added over a 10 minute period to a mixture of 3-phenylbenzoic acid (200 mg, 1 mmol) dissolved in a mixture THF/DMF (3.5 mL/58 μL). After the addition, the reaction was stirred at room temperature for 2.5 hours. Cyclohexylmethylamine (325 μL, 2.5 mmol) was then added into half of the acid chloride solution at 0° C. The reaction mixture was then stirred at room temperature for 18 hours. The reaction mixture was concentrated and water was added to the residue. The aqueous phase was extracted 3 times with CH2Cl2. The combined organic layers were washed with 2N HCl, saturated NaHCO3, brine, dried over Na2SO4 and concentrated. Diethyl ether was added to the residue and a white solid precipitated which was collected by filtration and rinsed with a small amount of diethyl ether. The white solid was then dried under vacuum (115 mg, 78%). NMR 1H (ppm, CDCl3): 7.95 (s, 1H), 7.69 (d, J3=7.80 Hz, 2H), 7.59 (d, J3=8.22 Hz, 2H), 7.50-7.33 (m, 4H), 6.22 (br. s., 1H), 3.31 (t, J3=6.29 Hz, 2H), 1.80-1.53 (m, 6H), 1.31-1.10 (m, 3H), 1.05-0.84 (m, 2H).

Provenance & Evidence