p-Toluenesulfonic acid monohydrate → 3-(4-(3-(3-Chloro-4-isopropoxyphenyl)-1,2,4-oxadiazol-5-yl)phenoxy)propane-1,2-diol

Participants

Reaction Conditions

Reaction Steps

3-(3-chloro-4-isopropoxyphenyl)-5-(4-((2,2-dimethyl-1,3-dioxolan-4-yl)methoxy)phenyl)-1,2,4-oxadiazole (0.1 g, 0.225 mmol) and p-toluenesulfonic acid monohydrate (8.55 mg, 0.045 mmol) were added in methanol (2.4 mL). The reaction mixture was heated at 70° C. for 16 hr. The solution was cooled, methanol (1.5 mL) was added to the mixture and recrystallized, the resulted suspension was filtered, the solid was washed by abundant water to afford 3-(4-(3-(3-chloro-4-isopropoxyphenyl)-1,2,4-oxadiazol-5-yl)phenoxy)propane-1,2-diol (0.08 g, 0.198 mmol, 88% yield) as white solid. LC/MS (Purity QC) Rt=2.97 min.; MS m/z: 405.18 (M+H)+. 1H NMR (400 MHz, Solvent d-DMSO) ppm 8.16-8.09 (m, 2H), 8.05 (d, J=2.13 Hz, 1H), 7.99 (dd, J=8.64, 2.15 Hz, 1H), 7.38 (d, J=9.05 Hz, 1H), 7.25-7.16 (m, 2H), 5.03 (d, J=5.19 Hz, 1H), 4.87-4.78 (m, 1H), 4.72 (t, J=5.68 Hz, 1H), 4.15 (dd, J=3.97, 10.01 Hz, 1H), 4.01 (dd, J=6.20, 10.03 Hz, 1H), 3.84 (dt, J=4.04, 5.69, 5.91 Hz, 1H), 3.47 (t, J=5.84 Hz, 2H), 1.35 (d, J=6.03 Hz, 6H).

Provenance & Evidence