Pyridine → 2-[5-(3,5-Bistrifluoromethylpyrazol-1-ylmethyl)-2-(3-chloropyridin-2-yl)-2H-pyrazol-3-yl]-6-chloro-8-methylbenzo[d][1,3]oxazin-4-one

Participants

Reaction Steps

Under argon 0.12 ml (1.60 mmol) of methanesulphonyl chloride in 3 ml of acetonitrile are cooled to 0° C. and subsequently a solution of 540 mg (1.228 mmol) of 5-(3,5-bistrifluoromethylpyrazol-1-ylmethyl)-2-(3-chloropyridin-2-yl)-2H-pyrazole-3-carboxylic acid in 0.17 ml (2.09 mmol) of pyridine and 6 ml of acetonitrile is added dropwise. The mixture is stirred at this temperature for 15 minutes and then a solution of 228 mg (1.228 mmol) of 2-amino-5-chloro-3,N-dimethylbenzamide in 0.35 ml (4.30 mmol) of pyridine and 6 ml of acetonitrile is added. After a further 15 minutes at 0° C. the mixture is admixed with 0.12 ml (1.60 mmol) of methanesulphonyl chloride and warmed slowly to room temperature overnight. The solvent is removed in vacuo, 15 ml of water are added and the crystals formed are filtered off with suction.

Provenance & Evidence