Oxalyl chloride → 2-(3,5-Bis(trifluoromethyl)phenyl)-2-methylpropanoyl chloride

Participants

Reaction Steps

15.0 g (50 mmol) 2-(3,5-bis-trifluoromethyl-phenyl)-2-methyl-propionic acid were dissolved in 127.5 ml dichloromethane in the presence of 0.75 ml DMF. 8.76 ml (2 eq.) Oxalyl chloride were added and after 4.5 hours, the solution was rotary evaporated to dryness. 9 ml Toluene were added and the resulting solution was again rotary evaporated, then dried under high vacuum yielding 16.25 g (quant.) of 2-(3,5-bis-trifluoromethyl-phenyl)-2-methyl-propionyl chloride as a yellow oil of 86% purity according to HPLC analysis. NMR (250 MHz, CDCl3): 7.86 (br s, 1H); 7.77, (br s, 2H, 3 Harom); 1.77 (s, 6H, 2 CH3).

Provenance & Evidence