反应详情

A mixture of [S-(R*,S*)]-2,4-dihydro-2-(2-hydroxy-1-methylpropyl)4-[4-[4-(4-methoxyphenyl)-1-piperazinyl]phenyl]-3H-1,2,4-triazol-3-one (0.01 mol), p-toluene-sulfonyl chloride (0.012 mol), triethylamine (2 g) and dimethylaminopyridine (0.5 g) in CH2Cl2 (100 ml) was stirred at room temperature for 4 days. The mixture was taken up in CH2Cl2 and purified by column chromatography over silica gel (eluent: CH2Cl2 100%). The pure fractions were collected and the solvent was evaporated. The residue was triturated in methylisobutyl keton, filtered off and dried, yielding 4.6 g (79%) [S-(R*,S*)]-2,4-dihydro-4-[4-[4-(4-methoxyphenyl)-1-piperazinyl]phenyl]-2-[1-methyl-2-[[(4-methylphenyl)sulfonyl]oxy]propyl]-3H-1,2,4-triazol-3-one (interm. 134).

1. custompurified by column chromatography over silica gel (eluent: CH2Cl2 100%)
2. customThe pure fractions were collected
3. customthe solvent was evaporated
4. customThe residue was triturated in methylisobutyl keton
5. filtrationfiltered off
6. customdried