反应详情

A solution of 1.0 g (6.92 mmol) of 2-chloro-4-methoxypyrimidine, 1.49 g (8,30 mmol) of 1-(2-furylcarbonyl)piperazine and 1.39 g (13.84 mmol) of triethylamine in 20 mL of n-butanol is maintained under gentle reflux conditions overnight. The solvent is evaporated off under reduced pressure and the crude residue is diluted in chloroform and washed in water. The organic phase is dried over NaSO4 and evaporated to dryness to give a crude product which is purified using silica-gel chromatography eluting with ethyl acetate/petroleum ether 70:30 to yield an oil which solidifies when left to stand. The solid is suspended in petroleum ether to yield 1.4 g (4.86 mmol) of 2-[4-(2-furylcarbonyl)-1-piperazinyl]-4-methoxypyrimidine. m.p.=85-86° C.

1. temperatureunder gentle reflux conditions overnight
2. customThe solvent is evaporated off under reduced pressure
3. additionthe crude residue is diluted in chloroform
4. washwashed in water
5. dry with materialThe organic phase is dried over NaSO4
6. customevaporated to dryness
7. customto give a crude product which
8. customis purified
9. washeluting with ethyl acetate/petroleum ether 70:30
10. customto yield an oil which
11. waitleft