反应详情

温度

0 °C

Under nitrogen, 630 mg (3.5 mmol) of 3,5-dibutyl-1H-1,2,4-triazole from step 3 of Example 1 was added in small portions to 5.4 mmol of sodium hydride in 8 mL of DMF; stirring was continued until hydrogen evolution had ceased. The anion solution was cooled to 0° C. and treated with a solution of the crude ethyl 2-(5-bromomethyl-2-pyridinyl)benzoate from step 7 in 10 mL of DMF. The reaction was stirred at ambient temperature overnight, quench with 1 mL of absolute ethanol, and concentrated in vacuo; the resulting residue was redisolved in methylene chloride, filtered, and reconcentrated in vacuo to give crude ethyl 2-[5-[(3,5-dibutyl-1H-1,2,4-triazol-1-yl)methyl]-2-pyridinyl]benzoate.

1. stirringThe reaction was stirred at ambient temperature overnight
2. customquench with 1 mL of absolute ethanol
3. concentrationconcentrated in vacuo
4. filtrationfiltered