Tetrabutylammonium Fluoride → HCID 86718932, compound

Participants

Reaction Steps

To a solution of ethyl 4-(4-(tert-butoxycarbonyl)-2-((S)-3-((tert-butyldimethylsilyloxy)methyl)-1,2,3,4-tetrahydroisoquinoline-2-carbonyl)phenyl)-5-butyl-1-phenyl-1H-pyrazole-3-carboxylate (Intermediate 259E, 207 mg, 0.275 mmol) in THF (2.0 mL) at room temperature was added TBAF (0.413 mL, 0.413 mmol). After stirring at room temperature for 1 h, the reaction mixture was diluted with EtOAc, washed with sat. aq. sodium bicarbonate solution, dried over anhydrous sodium sulfate and concentrated in vacuo. The residue was purified by flash chromatography (Isco 40 g column eluting with 0-70% EtOAc/hexanes) to give ethyl 4-(4-(tert-butoxycarbonyl)-2-((S)-3-(hydroxymethyl)-1,2,3,4-tetrahydroisoquinoline-2-carbonyl)phenyl)-5-butyl-1-phenyl-1H-pyrazole-3-carboxylate (113 mg, 0.177 mmol, 64%) as a colorless oil.

Provenance & Evidence