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化易AI
2023-02-21回答
不必保护(1) Commercially available 4-formylbenzoic acid (5.0 g, 33.3 mmol) was dissolved in a mixture of anhydrous tetrahydrofuran (100 ml) and anhydrous N,N-dimethylformamide (1 ml) and the mixture was cooled with stirring to 0.degree. C. To the resulting mixture was added dropwise oxalyl chloride (3.8 ml, 43.3 mmol). The mixture was stirred at room temperature for 30 minutes and then at 40.degree. C. for 20 minutes. The reaction mixture was concentrated under reduced pressure and then in vacuo to afford 4-formylbenzoyl chloride.
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