Hydrochloric Acid → 1-[9-Chloro-1-(2,4-dichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]-2,2,2-trifluoroethanol

Participants

Reaction Steps

To a stirred solution of 9-chloro-1-(2,4-dichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazole-6-carbaldehyde (500 mg, 1.31 mmol) and trimethyl(trifluoromethyl)silane (582 μL, 3.94 mmol) in tetrahydrofuran (6.5 mL) was added a solution of tetrabutylammonium fluoride in tetrahydrofuran (1.0 M, 131 μL, 0.131 mmol) at 0° C. After 15 min, hydrochloric acid (1.0 M, 2.0 mL) was added. After 30 min, the reaction mixture was diluted with ethyl acetate, washed with aqueous sodium hydrogen carbonate and brine, dried over sodium sulfate, filtered, and concentrated in vacuo. The resulting solid was washed with diisopropyl ether to give the title compound as a colorless solid (590 mg, 1.30 mmol, 99%).

Provenance & Evidence