Hydrogen Bromide → HCID 178515935, compound

Participants

Reaction Steps

5-(2′-Methoxy-biphenyl-3-yl)-1H-tetrazole 8c (15.5 g, 61.5 mol) was dissolved in 195 mL of acetic acid followed by addition of 195 mL of hydrobromic acid under argon atmosphere. The reaction mixture was heated to reflux for 5 hours. The reaction was monitored by TLC until the disappearance of the starting materials. The mixture was cooled to room temperature overnight. The mixture was filtered and the filter cake was dissolved in 500 mL of ethyl acetate. The mixture was washed with water (500 mL×2), dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure. The residue was recrystallized from 100 mL of ethyl acetate to obtain the title compound 3′-(1H-tetrazol-5-yl)-biphenyl-2-ol 8d (12 g, yield 82.8%) as a white solid.

Provenance & Evidence