反应详情

A solution of 4-amino-6-chloro-2-mercapto-pyrimidine mesylate salt (290 mg, 1.1 mmol) in 2 mL of N,N-dimethylformamide at 0° C. is treated with 92 mg (60% in oil, 2.3 mmol) of sodium hydride and warmed to room temperature for 1 h. A solution of 3-methoxy-4-ethyl-6-(1-chloroethyl)-pyridine (225 mg, 1.1 mmol) in 2×1 mL of N,N-dimethylformamide is added dropwise to the mixture and the reaction was stirred for 18 h. The reaction is diluted with 50 mL of ethyl acetate, was washed with 4×25 mL of 50% saturated sodium chloride and dried over potassium carbonate. The organics are concentrated in vacuo and the crude material is chromatographed over 20 g of silica gel (230-400 mesh), eluting with 50% ethyl acetate/hexanes to afford 256 mg of an oil which upon crystallization from ether gave 188 mg (53%) of Cpd #245 (Melting Pt. 136-137° C.).

1. washwas washed with 4×25 mL of 50% saturated sodium chloride
2. dry with materialdried over potassium carbonate
3. concentrationThe organics are concentrated in vacuo
4. customthe crude material is chromatographed over 20 g of silica gel (230-400 mesh)
5. washeluting with 50% ethyl acetate/hexanes