反应详情

Sodium methoxide (0.5M in methanol) (5.7 ml, 2.85 mmol, Eq: 1.22) was added to cyanamide (108 mg, 2.58 mmol, Eq: 1.1). After 15 minutes, the solution was added to a solution of 2,6-dichloro-4-isothiocyanatobenzonitrile (537 mg, 2.34 mmol, Eq: 1.00) in methanol (5 mL). After 1 hr, methyl iodide (704 mg, 310 μl, 4.96 mmol, Eq: 2.11) was added and the reaction was stirred overnight at room temperature. The resulting suspension was filtered and dried to give 43 mg of desired product as a gray solid. The filtrate was concentrated and chromatographed (40 g Analogix, 50% EtOAc/hex to 75% EtOAc/hex) to give 191 mg of desired product as a yellow solid. The solids were combined to give 234 mg (35%) of desired product.

1. waitAfter 1 hr
2. filtrationThe resulting suspension was filtered
3. customdried