METHYL 4-FORMYL-3-HYDROXYBENZOATE

Uses

4-Carbomethoxysalicylaldehyde is used in the preparation of α-glucosidase inhibitors. Also used in the preparation of β-lactamase substrates.

Synthesis

Step 1: Synthesis of methyl 4-formyl-3-hydroxybenzoate (239) 4-Formyl-3-hydroxybenzoic acid (1.2 g, 7.22 mmol) was dissolved in methanol (10 ml). Sulfoxide chloride (1.054 ml, 14.45 mmol) was added slowly and the reaction mixture was stirred at 60 °C for 3 h to ensure complete reaction. After completion of the reaction, the reaction mixture was concentrated under reduced pressure. The crude product was ground with hexane and subsequently filtered to afford methyl 4-formyl-3-hydroxybenzoate (1.3 g, 7.22 mmol, 100% yield) as a white solid. Mass spectrometric analysis (MS/ESI+) showed the molecular ion peak m/z 181.04 [MH]+.

References

[1] Patent: US2014/155391, 2014, A1. Location in patent: Paragraph 0617; 0618
[2] Patent: US2012/245144, 2012, A1. Location in patent: Page/Page column 105
[3] Journal of the American Chemical Society, 1955, vol. 77, p. 973,979
[4] Journal of Medicinal Chemistry, 1969, vol. 12, # 3, p. 420 - 424
[5] Bioorganic and Medicinal Chemistry, 2001, vol. 9, # 5, p. 1175 - 1183