Triethyl phosphite → HCID 53781352, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 3-[3-(bromomethyl)-1,2-benzisothiazol-5-yl]-1-methyl-6-(trifluoromethyl)-2,4(1H,3H)-pyrimidinedione (1.00 g, 0.00240 mol) in diethyl ether is cooled to 10° C., treated dropwise with triethyl phosphite (0.580 mL, 0.00340 mol), stirred at 10° C. for 90 minutes, diluted with 10 mL of tetrahydrofuran, stirred at room temperature overnight, refluxed for 1 day, cooled, partially concentrated in vacuo and diluted with methylene chloride. The resultant organic solution is washed with water, dried over anhydrous magnesium sulfate, and concentrated in vacuo to obtain a yellow solid. Flash column chromatography of the solid using silica gel and a diethyl ether/methylene chloride solution (1:1) gives the title product as a white solid (0.930 g, mp 142-144° C.).

Provenance & Evidence