反应详情

3 M Ethyl magnesium bromide in THF (6.0 ml, 18.0 mmol) was added dropwise to a solution of 4-iodo-2-methyl-1-trityl-1H-imidazole (5.30 g, 11.8 mmol) in THF (100 ml) at −78° C. After stirring for 2 h, tributyltin chloride (5.0 ml, 18.4 mmol) was added. After stirring for an additional 2 h, the solution was diluted with water and extracted with methylene chloride. The combined organic extracts were dried over magnesium sulfate, filtered and concentrated under reduced pressure to yield 8.49 g of impure 2-methyl-4-(tributylstannyl)-1-trityl-1H-imidazole as a orange liquid. Method [7] Retention time 11.32 min by HPLC (MH+ 615).

1. stirringAfter stirring for an additional 2 h
2. extractionextracted with methylene chloride
3. dry with materialThe combined organic extracts were dried over magnesium sulfate
4. filtrationfiltered
5. concentrationconcentrated under reduced pressure