反应详情

温度

0 °C

To a suspension of potassium tert-butoxide (1.23 g, 1.5 equiv) in methylene chloride (70 mL, −20° C.) was added a solution of N-benzyloxycarbonyl-α-phosphonoglycine trimethyl ester (3.63 g, 1.5 equiv) in methylene chloride (15 mL). The resulting solution was stirred 5 min and treated with the 6-methoxy-pyridine-3-carbaldehyde (1.0 g, 7.3 mmol) in methylene chloride (15 mL). After stirring for 1.5 h, the reaction was warmed to 0° C. and stirred 1 h. The reaction was quickly poured into a separatory funnel containing ethyl acetate and water. Brine was added to aid in separation of the layers. The aqueous was extracted with ethyl acetate (3×) which were in turn washed with brine, dried over magnesium sulfate, and concentrated to give 2.63 g (quant.) which was used without purification. Mass spec.: 343.08 (MH)+.

1. stirringAfter stirring for 1.5 h
2. stirringstirred 1 h
3. additionThe reaction was quickly poured into a separatory funnel
4. customto aid in separation of the layers
5. extractionThe aqueous was extracted with ethyl acetate (3×) which
6. washwashed with brine
7. dry with materialdried over magnesium sulfate
8. concentrationconcentrated
9. customto give 2.63 g (quant.) which
10. customwas used without purification