反应详情

A suspension of 0.120 g (0.373 mmol) of 2-methyl-6-(2-methyl-4,5,7,8-tetrahydro-thiazolo[4,5-d]azepin-6-yl)-5-nitro-3H-pyrimidin-4-one (example 1), of 0.070 g (0.45 mmol) of the ethyl iodide and of 0.077 g (0.56 mmol) of potassium carbonate in 1.0 ml of N,N-dimethylformamide was stirred at room temperature for 4 hours. The reaction mixture was then poured into 50 ml of an ice/water mixture and extracted 3 times with 50 ml of ethylacetate. The combined ethylacetate phases were dried over magnesium sulfate and evaporated under reduced pressure. The residue formed was then chromatographed on silica gel using a 95:5 v/v mixture of dichloromethane and methanol as eluent giving in a first fraction 0.025 g (0.072 mmol, yield 19%) of the 6-(6-ethoxy-2-methyl-5-nitro-pyrimidin-4-yl)-2-methyl-5,6,7,8-tetrahydro-4H-thiazolo[4,5-d]azepine as yellow amorphous solid; MS: [M+H]+=350.

1. extractionextracted 3 times with 50 ml of ethylacetate
2. dry with materialThe combined ethylacetate phases were dried over magnesium sulfate
3. customevaporated under reduced pressure
4. customThe residue formed
5. customwas then chromatographed on silica gel using
6. additiona 95:5 v/v mixture of dichloromethane and methanol as eluent