反应详情

10.5 g of 2-(tetrazol-5-yl)-5-bromopyridine prepared in the Preparation example 6 was dissolved in 100 ml of dimethylformamide. And then 6.5 g of sodium hydroxide was added to the solution and 9.3 g of iodomethane was slowly added to the solution at the temperature of 0° C. The solution was stirred for 6 hours at room temperature, added with water, extracted with ethyl acetate. And then the organic layer was washed with brine, dehydrated, filtrated, concentrated in vacuo and purified by column chromatography to obtain 4 g of 2-(1-methyltetrazol-5-yl)-5-bromopyridine and 5 g of 2-(2-methyltetrazol-5-yl)-5-bromopyridine.

1. additionwas slowly added to the solution at the temperature of 0° C
2. extractionextracted with ethyl acetate
3. washAnd then the organic layer was washed with brine
4. filtrationfiltrated
5. concentrationconcentrated in vacuo
6. custompurified by column chromatography