1-Benzyl-(3R)-methylpiperazine-2-one → 1-Benzyl-3-methylpiperazine

HRID 234283

반응식

HRID 234283 반응식
[CH2:1]([N:8]1[CH2:13][CH2:12][NH:11][C@H:10]([CH3:14])[C:9]1=O)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[H-].[Al+3].[Li+].[H-].[H-].[H-]>C1COCC1>[CH2:1]([N:8]1[CH2:13][CH2:12][NH:11][CH:10]([CH3:14])[CH2:9]1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

참가 물질

4

반응물 2

HCID 100131621-Benzyl-(3R)-methylpiperazine-2-oneHCID 21226445Aluminium lithium hydride

생성물 1

HCID 27275201-Benzyl-3-methylpiperazine

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매

실험 절차

A mixture of 1-benzyl-3R-methylpiperazine-2-one (XX, 4.36 g), lithium aluminum hydride (LAH, 2.33 g) and THF (125 ml) is heated at reflux for 16 hr. After cooling to 20°-25°, the mixture is quenched slowly with water (2.3 ml), sodium hydroxide (10%, 3.5 ml) and water (5.7 ml). The residue is diluted with ether (100 ml) and is stirred for 1 hr. The solids are filtered and washed successively with ether, methylene chloride and ether. The combined filtrates are dried over potassium carbonate, filtered and concentrated to give 1-benzyl-(3R)-methylpiperazine (XXI), sufficiently pure to be carried on crude, NMR (CDCl3) 7.2-7.4, 3.49, 2.7-3.0, 1.95-2.1, 166, 1.3-1.7 and 1.01 δ.

후처리

  1. temperatureis heated
  2. temperatureat reflux for 16 hr
  3. temperatureAfter cooling to 20°-25°
  4. customthe mixture is quenched slowly with water (2.3 ml), sodium hydroxide (10%, 3.5 ml) and water (5.7 ml)
  5. additionThe residue is diluted with ether (100 ml)
  6. filtrationThe solids are filtered
  7. washwashed successively with ether, methylene chloride and ether
  8. dry with materialThe combined filtrates are dried over potassium carbonate
  9. filtrationfiltered
  10. concentrationconcentrated

출처 및 근거

ORD 기록
ord-2398a8523c694a7981b6f368416efd52
출처 데이터셋
uspto-grants-1997_01
특허 번호
US05594140

연결된 노트

불러오는 중…