反应详情

温度

65 °C

Sodium hydride (8.4 g, 60% suspension in oil, washed with hexane) is suspended in dry DMF (100 mL) under an atmosphere of dry N2 and a solution of methyl 2-cyano-3-(2-furanyl)propionate (U.S. Pat. No. 4,279,903) (37.6 g) in DMF (100 mL) is added dropwise. When the addition is complete, a clear red solution is formed. 2-Amino-6-chloro-5-nitro-4(3H)-pyrimidinone (recrystallized from methanol) (13.34 g) is added as a solid. The reaction mixture is heated at 100° C. for 1 h and at 65° C. overnight. The reaction mixture is cooled in an ice bath, acidified with 10% aq HCl and diluted with enough water to precipitate out the product 2-Amino-α-cyano-α-(2-furanylmethyl)-1,6-dihydro-5-nitro-6-oxo-4-pyrimidineacetic acid, ethyl ester. The product is collected by filtration and rinsed with water and ether (18.5 g). ##STR20##

1. additionWhen the addition
2. customa clear red solution is formed
3. temperatureThe reaction mixture is cooled in an ice bath
4. customto precipitate out the product 2-Amino-α-cyano-α-(2-furanylmethyl)-1,6-dihydro-5-nitro-6-oxo-4-pyrimidineacetic acid, ethyl ester
5. filtrationThe product is collected by filtration
6. washrinsed with water and ether (18.5 g)