Lithium Hydroxide → HCID 58292752, compound

Participants

Reaction Steps

A solution of 2-(3-ethoxycarbonylmethyl-1-hydroxy-4-methyl-1,3-dihydro-benzo[c][1,2]oxaborol-6-yloxy)-thiazole-4-carboxylic acid methyl ester (500 mg, 1.28 mmol) in THF (30 mL) was treated with LiOH (107 mg, 2.55 mmol) in water (15 mL) at room temperature for 1 h. The reaction was concentrated to dryness. The residue was diluted with water and adjusted to pH 3. The mixture was purified by preparative HPLC to give the title compound (33 mg). 1H NMR (300 MHz, CD3OD) δ 7.87 (s, 1H), 7.35 (s, 1H), 7.25 (s, 1H), 5.70-5.66 (m, 1H), 3.27-3.10 (m, 1H), 2.39 (s, 3H), 2.36-2.31 (m, 1H). MS found: (M+H)+: 350.1.

Provenance & Evidence