反应详情

To 2.1 g of diisopropylamine dissolved in 15 ml of tetrahydrofuran and cooled in an ice salt bath was added 8.0 ml of a 2.7 molar solution of n-butyllithium in hexane. After stirring for 5 minutes a solution of 4.2 g of N,3-bis-(4-chlorophenyl)-4-phenyl-4,5-dihydro-1H-pyrazole-1-carboxamide (Example D) in 15 ml of tetrahydrofuran was added and the resulting solution stirred for 15 minutes. To this solution was added 1.0 ml of iodomethane and, after 15 minutes 1.0 ml of acetic acid was added. The reaction mixture was partitioned between diethyl ether and water and the organic layer was dried over anhydrous magnesium sulfate. The resulting solution was filtered evaporated in vacuo to give 4.3 g of N,3-bis-(4-chlorophenyl)-4-phenyl-4-methyl-4,5-dihydro-1H-pyrazole-1-carboxamide, melting point 151°-158° C. NMR and IR data were consistent with the structure.

1. temperaturecooled in an ice salt bath
2. additionwas added
3. customThe reaction mixture was partitioned between diethyl ether and water
4. dry with materialthe organic layer was dried over anhydrous magnesium sulfate
5. filtrationThe resulting solution was filtered
6. customevaporated in vacuo