反应详情

0.35 g (2 mmol) of N-benzyl-piperidine was added to a solution of 0.35 g (1 mmol) of 3-benzenesulphonyl-7-chloro-5-methyl-2-methylsulphanyl-pyrazolo[1,5-a]pyrimidine in 5 ml of DMF and stirred at 60° for 2 hrs. The reaction solution was cooled to RT and evaporated in a high vacuum. The residue was partitioned between 2N NaOH and CH2Cl2. The aqueous phase was extracted three times with CH2Cl2, and the combined organic phases were dried (MgSO4), filtered and evaporated. Subsequent chromatography (SiO2, CH2Cl2/MeOH 19:1) and crystallization from EtOH yielded 0.36 g (73%) of 3-benzenesulphonyl-7-(4-benzyl-piperazin-1-yl)-5-methyl-2-methylsulphanyl-pyrazolo[1,5-a]pyrimidine as colorless crystals m.p. 156-158°.

1. customevaporated in a high vacuum
2. customThe residue was partitioned between 2N NaOH and CH2Cl2
3. extractionThe aqueous phase was extracted three times with CH2Cl2
4. dry with materialthe combined organic phases were dried (MgSO4)
5. filtrationfiltered
6. customevaporated
7. customSubsequent chromatography (SiO2, CH2Cl2/MeOH 19:1) and crystallization from EtOH