反应详情

A mixture of 4-[(3-methoxy-pyrazin-2-ylamino)-methyl]-piperidine (EXAMPLE 127, STEP 3) (0.093 g, 0.00042 mol) and N-(4-methylbenzyloxycarbonyloxy)succinimide (INTERMEDIATE 1A) (118 mg) in DMF (2 mL) was stirred at rt for 18 h. The reaction was diluted with ethyl acetate (30 mL), washed with 10% aqueous sodium bicarbonate (20 mL) followed by brine (10 mL), concentrated in vacuo and chromatographed on silica using a gradient elution of 5–15% acetone/dichloromethane. Concentration in vacuo followed by crystallization from ether/hexane gave the title compound. M.S. (M+1): 371.

1. washwashed with 10% aqueous sodium bicarbonate (20 mL)
2. concentrationconcentrated in vacuo
3. customchromatographed on silica using
4. washa gradient elution of 5–15% acetone/dichloromethane
5. concentrationConcentration in vacuo
6. customfollowed by crystallization from ether/hexane