Methanol → Methyl 2-hydroxy-5-iodo-3-methoxybenzoate

温度

0 °C

The esterification of 3-methoxysalicylic acid was performed according to the literature. Bishop, J. E., et al., J. Med. Chem. 34, 1612-1624 (1991).The ester product (1.68 g, 9.20 mmol) was dissolved in methanol (35 mL). Sodium iodide (1.38 g, 9.20 mmol) and sodium hydroxide (0.34 g, 9.2 mmol) were added, and the solution was cooled to 0° C. To this solution aqueous sodium hypochlorite (17.25 g, 5% naCIO) was added dropwise. The colorless slurry mixture was stirred for 1 h at 0°-3° C., then treated with 10% aqueous sodium thiosulfite. The mixture was adjustedto pH 7 using 5% aqueous HCI. Ether (50 mL) was added and the layers were separated. The ether layer was washed with brine and dried over anhydrous sodium sulfate. After the ether was evaporated, the crude orange solid waspurified by column chromatography (silica gel, CHCI3) to obtain 1.2 g (43%) of the iodoproduct; m.p. 104° C. (lit4 110°-112° C.). The spectra were the the same as those published in the literature. Yue, E. W., et al., J. Org. Chem. 56, 5451-5456 (1991).

1. customthe layers were separated
2. washThe ether layer was washed with brine
3. dry with materialdried over anhydrous sodium sulfate
4. customAfter the ether was evaporated
5. customto obtain 1.2 g (43%) of the iodoproduct
6. customm.p. 104° C. (lit4 110°-112° C.)

ORDレコード

ord-bdb7e456b39741e28cbcad167c010eb7

出典データセット

uspto-grants-1995_08

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US05446147