Diisopropylethylamine → HCID 11386291, compound

Participants

Reaction Steps

At room temperature, 273 mg (1.0 mmol) of 3-iodo-1-methyl-1H-pyrazole-4-carboxylic acid, 213 mg (0.83 mmol) of 3′,4′-dichloro-5-fluorbiphenyl-2-amine, 0.3 ml (1.67 mmol) of N,N-diisopropyl-ethylamine and 583 mg (1.25 mmol) of bromotripyrrolidinophosphonium hexafluorophosphate were stirred in 5 ml of methylene chloride for 3 days. The mixture was washed with saturated sodium bicarbonate solution and then with water. Removal and concentration of the organic phase gave 910 mg of crude product. Purification by column chromatography on silica gel 60 using methylene chloride/diethyl ether 5:1 gave 230 mg (53.5% of theory) of N-(3′,4′dichloro-5-fluoro-1,1′-biphenyl-2-yl)-3-iodo-1-methyl-1H-pyrazole4-carboxamide (compound No. 6 from table 1) of logP (pH 2.3)=3.42.

Provenance & Evidence