反应详情

To a solution of (2S)-5-oxotetrahydrofuran-2-carboxylic acid (compound 28a, 70 g, 539 mmol) and a drop of DMF in anhydrous DCM (500 mL) was added oxalyl dichloride (137 g, 1.07 mol) dropwise. The reaction mixture was stirred at room temperature for 3 hours. The reaction was then concentrated in vacuo to afford 70 g crude product of (2S)-5-oxotetrahydrofuran-2-carbonyl chloride (compound 28b), which was used in next step without further purification.

1. concentrationThe reaction was then concentrated in vacuo