Triethylamine → Bis-[(2-triethylsilyl-4-furyl)methyl]oxalate

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반응 단계

Oxalyl chloride (0.59 ml, 6.79 mmol) was added dropwise to a solution of 4-hydroxymethyl-2-triethylsilylfuran (Compound 1, 1.2 g, 5.66 mmol) and triethylamine (0.95 ml, 6.79 mmol) in dichloromethane (10 ml) at 0°. After 10 minutes, the reaction mixture was quenched with ice. Extraction (dichloromethane) and evaporation of the dried (magnesium sulfate) extracts gave an oil, which was purified by flash chromotograhy on silica using 5% ethyl ether/hexane. Fractions with Rf of about 0.17 gave, after evaporation the title oxalate ester as a colorless oil.

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