Lithium Hydroxide → HCID 69319218, compound

Participants

Reaction Steps

To a solution of methyl[2-(5-acetyl-2-methoxy-benzylsulfanyl)-6-fluoro-benzoimidazol-1-yl]-acetate (Precursor 6-F-H-11b, 11.3 mg, 0.029 mmol) in dry THF (0.3 ml) is added some 1 N aqueous lithium hydroxide solution (0.140 ml, 5 eq.). The resulting biphasic solution is allowed to stir 1 h at rt. The solvents are removed in vacuo, water is added as well as 1N HCl in water so as to set the pH of the aqueous solution to pH=1. The resulting acidic aqueous phase is extracted three times with AcOEt. The organic phase is dried over Na2SO4 and the solvent removed in vacuo and the product was dried under high vacuum. This yields the title compound (6 mg) in 55% as a greyish solid: tR=0.95 min (LC-3), ESI-MS (pos.): m/z 388.89 [M+H]+, ESI-MS (neg.): m/z 387.10 [M−H]+; 1H-NMR (DMSO-d6): δ (ppm) 2.40 (s, 3H, COCH3), 3.87 (s, 3H, OCH3), 4.49 (s, 2H, SCH2), 4.82 (s, 2H, CH2CO2), 7.01 (t, 1Harom), 7.09 (d, 1Harom), 7.42 (d, 1Harom), 7.53 (dd, 1Harom), 7.86 (d, 1Harom), 7.98 (s, 1Harom).

Provenance & Evidence