反应详情

3-Methoxy-4-(4-methyl-imidazol-1-yl)-benzaldehyde (2.00 g, 9.25 mmol) and anhydrous potassium carbonate (2.56 g, 18.5 mmol) were placed in a 250-mL flask and placed on high vacuum for 10 minutes. Under nitrogen, anhydrous MeOH (60 ml) was added via syringe. To the yellowish suspension was added dimethyl(1-diazo-2-oxopropyl) phosphonate (2.132 g, 11.10 mmol). The reaction was stirred at room temperature for 22 h. The reaction was quenched with aqueous sodium hydrogen carbonate (5%, 100 mL), and the mixture was diluted with diethyl ether (250 mL). The combined organic fractions were washed with brine (saturated, 2×100 mL), dried over MgSO4, filtered and evaporated. The residue was dried on high vacuum to give the title compound as a yellow solid (1.71 g, 87%). The product was pure enough by LCMS and NMR and not further purified.

1. customThe reaction was quenched with aqueous sodium hydrogen carbonate (5%, 100 mL)
2. additionthe mixture was diluted with diethyl ether (250 mL)
3. washThe combined organic fractions were washed with brine (saturated, 2×100 mL)
4. dry with materialdried over MgSO4
5. filtrationfiltered
6. customevaporated
7. customThe residue was dried on high vacuum