反应详情

A homogeneous mixture of 3-formyl-4-methoxypyridine 1 (7.0 g, 54.7 mmol) and ethyl azidoacetate (5.0 g, 36.4 mmol) in anhydrous EtOH (50 mL) was added through a dropping funnel to a well-stirred solution containing Na (0.1.24 g, 54.7 mmol) in anhydrous EtOH (30 mL) under N2 at −15° C. The mixture was stirred at that temperature for 4 h. During this time the precipitated solid was filtered and washed with ice cooled ethanol (30 mL). The compound was dried under vacuum oven for 3 h to get pure title compound 2 as white crystalline solid. Mp 92-95° C.; Yield: 4.8 g, 53%; ESI MS: m/z 248.9 (M+1).

1. additionwas added through a dropping funnel to a well-stirred solution
2. filtrationDuring this time the precipitated solid was filtered
3. washwashed with ice
4. temperaturecooled ethanol (30 mL)
5. customThe compound was dried under vacuum oven for 3 h