反应详情

温度

85 °C

To N-cyclopropyl-3-(3-(2-(2-hydroxyphenyl)propan-2-ylamino)-2-oxopyrazin-1(2H)-yl)-4-methylbenzamide (Example 134, 4.3 g) in acetonitrile (5 mL) was added potassium carbonate (2.84 g) followed by benzyl 2-chloroethyl(methyl)carbamate (2.69 g) and the reaction heated at 85° C. for 16 h under nitrogen. After cooling to room temperature, the mixture was evaporated to dryness and the residue partitioned between water (20 mL) and DCM (20 mL). The aqueous layer was separated and further extracted into DCM (2×20 mL). The combined organics were evaporated to leave crude benzyl 2-(2-(2-(4-(5-(cyclopropylcarbamoyl)-2-methylphenyl)-3-oxo-3,4-dihydropyrazin-2-ylamino)propan-2-yl)phenoxy)ethyl(methyl)carbamate (3.50 g) as a gum. Ethanol (150 mL) and P/C (0.611 g of 5%) were added and the reaction stirred under H2 atmosphere (2 bar) for 4 h. The mixture was filtered through Celite (washing pad with aliquots of ethanol) and the combined filtrates evaporated to leave the crude product (2.1 g). Recrystallisation from ethyl acetate gave the title product (1.15 g) as a white solid.

1. temperatureAfter cooling to room temperature
2. customthe mixture was evaporated to dryness
3. customthe residue partitioned between water (20 mL) and DCM (20 mL)
4. customThe aqueous layer was separated
5. extractionfurther extracted into DCM (2×20 mL)
6. customThe combined organics were evaporated