Triphenylphosphine → methyl 4-[(3aR,4R,6R,6aR)-6-({[bis(benzyloxy)phosphoryl]oxy}methyl)-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-yl]-3-oxo-3,4-dihydro-2-pyrazinecarboxylate

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Reaktionsschritte

In 4 mL of pyridine was dissolved 0.22 g of methyl 4-[(3aR,4R,6R,6aR)-6-(hydroxymethyl)-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-yl]-3-oxo-3,4-dihydro-2-pyrazinecarboxylate. Then, 0.17 g of dibenzyl phosphate, 0.40 g of triphenylphosphine and 0.30 mL of diisopropyl azodicarboxylate were successively added and stirred at room temperature for 15 hours, and the solvent was removed under reduced pressure. By purifying the residue by column chromatography [eluent: ethyl acetate], 0.37 g of methyl 4-[(3aR,4R,6R,6aR)-6-({[bis(benzyloxy)phosphoryl]oxy}methyl)-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-yl]-3-oxo-3,4-dihydro-2-pyrazinecarboxylate was obtained as an orange-colored solid product.

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