反应详情

α-Bromo-p-tolunitrile (5.41 g, 27.6 mmol) was added at once with stirring to a solution of 6-amino-1-methyluracil (V. Papesch and E. F. Schroeder. J. Org. Chem. (1951), 16, 1879) (3.90 g, 27.6 mmol) in 1:1 ethanol: 1N sodium hydroxide (56 ml) at 42° C. After 1.75 hours. the mixture was cooled, filtered and washed with water. The resulting solid and second crop obtained by evaporation of the filtrate were combined (5.80 g) and partially purified by silica gel chromatography followed by repeated trituration with 1:2 methanol; ether to give crude 4-[(6-Amino-1,2,3,4-tetrahydro-1-methyl-2,4-dioxo-3-pyrimidinyl)methyl]benzonitrile (0.86 g), indentified by NMR.

1. customat 42° C
2. temperaturethe mixture was cooled
3. filtrationfiltered
4. washwashed with water
5. customThe resulting solid and second crop obtained by evaporation of the filtrate
6. custompartially purified by silica gel chromatography