反应详情

0.083 mL (1 mmol) of sulfuryl chloride was added to a solution of 90 mg (0.41 mmol) of 8-methoxy-isoquinoline-3-carboxylic acid methyl ester (from Example 295) in 1 mL of acetic acid and stirred at room temperature overnight. Ether was added to the reaction mixture, and the precipitated solid was filtered, washed with ether, then partitioned between ethyl acetate (30 mL) and saturated NaHCO3 solution (30 mL) and extracted. The organic layer was dried over sodium sulfate, and evaporation of the solvent in vacuo gave 47.3 mg (46%) of 7-chloro-8-methoxy-isoquinoline-3-carboxylic acid methyl ester. LCMS: 252 (M+1)+. The ester was hydrolyzed according to the general procedure B to provide 40 mg (88%) of the 7-chloro-8-methoxy-isoquinoline-3-carboxylic acid. LCMS: 238 (M+1)+.

1. filtrationthe precipitated solid was filtered
2. washwashed with ether
3. custompartitioned between ethyl acetate (30 mL) and saturated NaHCO3 solution (30 mL)
4. extractionextracted
5. dry with materialThe organic layer was dried over sodium sulfate, and evaporation of the solvent in vacuo