反应详情

A stirred suspension of 4-(4-(4-pyridyl)piperazin-1 -yl)-phenol (1.34 g) in dry DMF (20 ml) was treated with sodium hydride (60% dispersion in mineral oil, 0.21 g) and the mixture stirred for 1 hour. To the resulting solution was added ethyl 4-bromobutyrate and the mixture was stirred for 16 hours. Solvent was evaporated under reduced pressure and the residue was partitioned between ethyl acetate and water. The organic layer was washed with water, filtered through phase separating paper (Whatman 1PS) and evaporated. The residue was purified by flash chromatography on silica, eluting with 1.5/92.5/6 v/v/v methanol/ethyl acetate/aqueous ammonia (SG 0.89) and recrystallised firom ethyl acetate/hexane to give the title compound (0.7 g) as a solid: m.p. 84°-85° C.; NMR (CDCl3) δ 8.3(2H,d); 6.86(4H,c) 6.72(2H,d); 4.12(2H,q); 4.0(2H,t); 3.47(4H,m); 3.20(4H,m); 2.5(2H,t); 2.1(2H,m); 1.26(3H,t); m/e 370(M+H)+ ; calculated for C21H27N3O3C, 68.3; H, 7.4; N, 11.4. Found: C, 68.1; H, 7.4; N, 11.1%.

1. stirringthe mixture was stirred for 16 hours
2. customSolvent was evaporated under reduced pressure
3. customthe residue was partitioned between ethyl acetate and water
4. washThe organic layer was washed with water
5. filtrationfiltered through phase
6. customseparating paper (Whatman 1PS)
7. customevaporated
8. customThe residue was purified by flash chromatography on silica
9. washeluting with 1.5/92.5/6 v/v/v methanol/ethyl acetate/aqueous ammonia (SG 0.89)
10. customrecrystallised firom ethyl acetate/hexane