反应详情

N-(3-Phenylpropionyl)-5-formyl-6,2′-dihydroxy-biphenyl-3-sulfonamide (0.065 g, 0.15 mmol), prepared as in Reference 22, 3,4-diaminobenzamidine hydrochloride (0.043 g 0.23 mmol) and benzoquinone (0.018 g, 0.16 mmol) were combined in ethanol (15 mL) and the mixture was heated under reflux for 1 hour. The solvent was evaporated in vacuum and the product was purified from the residue by reverse phase HPLC (acetonitrile/0.02N HCl gradient) to give 2-[2,2′-dihydroxy-5-(3-phenylpropionylaminosulfonyl)biphenyl-3-yl]-1H-benzoimidazole-5-carboxamidine (0.033 g). 1H NMR (DMSO-d6): δ 2.50 (t, J=7.7 Hz, 2H), 2.63 (t, J=7.7 Hz, 2H), 6.82-7.22 (m, 9H), 7.72 (dd, J1=9.2 Hz, J2=1.7 Hz, 1H), 7.78 (d, J=2.5 Hz, 1H), 7.84 (d, J=9.2 Hz, 1H), 8.18 (s, 1H), 8.68 (d, J=2.5 Hz, 1H), 8.99 (s, 2H), 9.34 (s, 2H), 12.06 (s, 1H). MS. found (M+H+) 556.4, (M−H+) 554.4, calc 555.16.

1. temperaturethe mixture was heated
2. temperatureunder reflux for 1 hour
3. customThe solvent was evaporated in vacuum
4. customthe product was purified from the residue by reverse phase HPLC (acetonitrile/0.02N HCl gradient)