Lithium hydroxide, monohydrate → 4'-Methyl-5-tetrazol-1-yl-biphenyl-3-carboxylic acid

Participants

Reaction Steps

A solution of LiOH.H2O (1.86 g, 44.2 mmol) in H2O (40 mL) was added dropwise to a suspension of 4′Methyl-5-tetrazol-1-yl-biphenyl-3-carboxylic acid methyl ester (10 g, 34 mmol) in THF (25 mL) at 0° C. The reaction mixture was allowed to warm to room temperature and was stirred until the reaction solution turned clear. Solvent was removed under vacuum and the aqueous solution was acidified by addition of 10% HCl to pH=3. The resulting precipitate was collected and dried to afford 4′-Methyl-5-tetrazol-1-yl-biphenyl-3-carboxylic acid as white solid (8.85 g, 93%). MS (M+H)=281.

Provenance & Evidence