反应详情

300 mg of 4-[((3-chloro-2-methylphenyl){2-[(4-methoxybenzyl)amino]-2-oxoethyl}amino)sulfonyl]benzoic acid was dissolved in 5.00 mL of THF, and 340 mg of ethyl chloroformate and 326 mg of triethylamine were added thereto, followed by stirring at room temperature for 1 hour. To the reaction liquid was added dropwise an aqueous solution (0.80 mL) of 360 mg of sodium borohydride over 30 minutes, followed by stirring at room temperature for 2 hours. The reaction liquid was acidified with addition of 8.0 mL of 1 M hydrochloric acid, and then extracted with a mixed solvent of chloroform/methanol (5/1), and the organic layer was dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure, and the obtained residue was purified by silica gel column chromatography (chloroform:methanol=100:0 to 90:10) to obtain a product, which was crystallized from diisopropyl ether to obtain 118 mg of N2-(3-chloro-2-methylphenyl)-N2-{[4-(hydroxymethyl)phenyl]sulfonyl}-N-(4-methoxybenzyl)glycinamide.

1. customTo the reaction liquid
2. stirringby stirring at room temperature for 2 hours
3. customThe reaction liquid
4. extractionextracted with a mixed solvent of chloroform/methanol (5/1)
5. dry with materialthe organic layer was dried over anhydrous sodium sulfate
6. customThe solvent was evaporated under reduced pressure
7. customthe obtained residue was purified by silica gel column chromatography (chloroform:methanol=100:0 to 90:10)
8. customto obtain a product, which
9. customwas crystallized from diisopropyl ether