反应详情

To a solution of 2-(methylthio)-cis-4,5-diphenyl-4,5-dihydro-1H-imidazole hydroiodide (42) (1.00 mg, 2.52 mmol), triethylamine (0.528 mL, 0.379 mmol), 4-dimethylamino-pyridine (10 mg) in dichloromethane (20 mL) is added phenyl chloroformate (0.379 mL, 3.02 mmol), and the mixture is stirred at rt overnight. The reaction mixture is diluted with dichloromethane and washed with water, brine, and the organic layer is dried (MgSO4), filtered, and evaporated. The residue is purified by chromatography on silica gel; gradient elution with heptane: EtOAc (70:30-60:40) gives 0.58 g of the product 548. 1H NMR (CDCl3) δ 7.25-6.95 (m, 11H), 6.95-6.80 (m, 2H), 6.80-6.70 (m, 2H), 5.80-5.65 (m, 2H), 2.62 (s, 3H). MS: m/z 389 (M++1).

1. washwashed with water, brine
2. dry with materialthe organic layer is dried (MgSO4)
3. filtrationfiltered
4. customevaporated
5. customThe residue is purified by chromatography on silica gel
6. washgradient elution with heptane: EtOAc (70:30-60:40)