Hydrochloric Acid → HCID 11164856, compound

Participants

Reaction Conditions

Reaction Steps

To a slurry of a 1:1 mixture of N1:N3 isomers 6-(4-cyano-2-methyl-phenylamino)-7-fluoro-(2-trimethylsilanyl-ethoxymethyl)-benzoimidazole-5-carboxylic acid cyclopropylmethyoxy-amide 11zz (28 mg, 0.055 mmol) in 0.5 mL EtOH is added 0.5 mL 10% HCl. The reaction mixture is heated to 50° C. with stirring overnight (Whitten et al., J. Org. Chem., 1986, 51, 1891-1894). An additional 0.5 mL 10% HCl is added and the reaction mixture stirred at 70° C. overnight. The reaction mixture is cooled to room temperature and neutralized to pH ˜8 with 1.5 mL 1N NaOH. The reaction mixture is extracted with ethyl acetate, dried (MgSO4) and concentrated under reduced pressure to give 14 mg (60%) of 90% pure product as a mixture of rotatomers: MS APCI (+) m/z 380 (M+1) detected; MS APCI (−) m/z 378 (M−1) detected; 1H NMR (400 MHz, MeOH-d4) δ 8.41 (bs, 1H), 7.75 (m, 1H), 7.50 (s, 1H), 7.38 (d, 1H), 6.51 (m, 1H), 3.72 (d, 0.5H), 3.65 (d, 1.5H), 2.41 (s, 3H), 0.98 (1H, m), 0.58 (d, 1.5H), 0.40 (d, 0.5H), 0.25 (d, 1.5H), 0.19 (d, 0.5H).

Provenance & Evidence