Piperazine → 4-[trans-(2-Hydroxycyclopentan-1-yl)oxy]-2-(1-piperazinyl)quinazoline

HRID 1416450

반응식

HRID 1416450 반응식
[C@@H:1]1([OH:7])[CH2:5][CH2:4][CH2:3][C@H:2]1[OH:6].Cl[C:9]1[N:18]=[C:17](Cl)[C:16]2[C:11](=[CH:12][CH:13]=[CH:14][CH:15]=2)[N:10]=1.[H-].[Na+].[NH:22]1[CH2:27][CH2:26][NH:25][CH2:24][CH2:23]1>CN(C)C=O.O1CCOCC1.O>[OH:6][C@@H:2]1[CH2:3][CH2:4][CH2:5][C@H:1]1[O:7][C:17]1[C:16]2[C:11](=[CH:12][CH:13]=[CH:14][CH:15]=2)[N:10]=[C:9]([N:22]2[CH2:27][CH2:26][NH:25][CH2:24][CH2:23]2)[N:18]=1

참가 물질

8

반응물 4

HCID 4837PiperazineHCID 24758Sodium hydrideHCID 225711trans-1,2-CyclopentanediolHCID 2528862,4-Dichloroquinazoline

생성물 1

HCID 154091264-[trans-(2-Hydroxycyclopentan-1-yl)oxy]-2-(1-piperazinyl)quinazoline수율 34.8%

시약·촉매·용매 3

HCID 962Water용매HCID 6228Dimethylformamide용매HCID 312751,4-Dioxane용매2회

실험 절차

To a solution of (1R,2R)-cyclopentane-1,2-diol [manufactured by Fluka Co.] (1.16 g) and 2,4-dichloroquinazoline (2.00 g) in dimethylformamide (40 ml) is added gradually 60% sodium hydride (in oil) (0.4 g) with stirring under ice-cooling, and the mixture is stirred at room temperature for 2 hours. The reaction mixture is poured into water and extracted with ethyl acetate twice, and the extract is washed with water, dried over anhydrous sodium sulfate and evaporated to dryness under reduced pressure. The resulting residue is briefly purified with medium pressure column chromatography (eluent, chloroform:methanol=100:1, v/v) to give an oily substance. The oily substance thus obtained is dissolved in dioxane (20 ml), and the mixture is slowly added dropwise to a solution of piperazine (1.9 g) in dioxane (20 ml) with stirring at 70° C., and the mixture is stirred at the same temperature for one hour. The reaction mixture is poured into ice-water and extracted with chloroform. The extract is wished with water, dried over anhydrous sodium sulfate, and evaporated to dryness under reduced pressure. The resulting residue is purified by medium pressure liquid column chromatography (eluent, chloroform:methanol=20:1, 5:1, v/v) to give 4-[(1R,2R)-(2-hydroxycyclopentan-1-yl)oxy]-2-(1-piperazinyl)-quinazoline (1.1 g).

후처리

  1. temperaturecooling
  2. stirringthe mixture is stirred at room temperature for 2 hours
  3. extractionextracted with ethyl acetate twice
  4. washthe extract is washed with water
  5. dry with materialdried over anhydrous sodium sulfate
  6. customevaporated to dryness under reduced pressure
  7. customThe resulting residue is briefly purified with medium pressure column chromatography (eluent, chloroform
  8. custommethanol=100:1, v/v) to give an oily substance
  9. customThe oily substance thus obtained
  10. stirringwith stirring at 70° C.
  11. stirringthe mixture is stirred at the same temperature for one hour
  12. extractionextracted with chloroform
  13. dry with materialdried over anhydrous sodium sulfate
  14. customevaporated to dryness under reduced pressure
  15. customThe resulting residue is purified by medium pressure liquid column chromatography (eluent, chloroform

출처 및 근거

ORD 기록
ord-7d90a691993345f2b7719474e195c330
출처 데이터셋
uspto-grants-1999_06
특허 번호
US05912247

연결된 노트

불러오는 중…