Sulfuric Acid → (R)-5-Biphenyl-4-ylmethyl-1-(2,2-dimethylpropionyl)-3,3-dimethyl-pyrrolidin-2-one

HRID 882514

반응식

HRID 882514 반응식
[C:1]1([C:21]2[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=2)[CH:6]=[CH:5][C:4]([CH2:7][C@H:8]2[N:12]([C:13](=[O:18])[C:14]([CH3:17])([CH3:16])[CH3:15])[C:11](=[O:19])[C@H:10]([CH3:20])[CH2:9]2)=[CH:3][CH:2]=1.[CH:27]([N-]C(C)C)(C)C.[Li+].CI.NCCC(CN)O.S(=O)(=O)(O)O>C1COCC1>[C:1]1([C:21]2[CH:22]=[CH:23][CH:24]=[CH:25][CH:26]=2)[CH:2]=[CH:3][C:4]([CH2:7][C@H:8]2[N:12]([C:13](=[O:18])[C:14]([CH3:17])([CH3:16])[CH3:15])[C:11](=[O:19])[C:10]([CH3:27])([CH3:20])[CH2:9]2)=[CH:5][CH:6]=1

참가 물질

7

반응물 5

HCID 1118Sulfuric AcidHCID 6328Methyl iodideHCID 1646562-HydroxyputrescineHCID 2724682Lithium diisopropylamideHCID 66738857(3R,5S)-5-biphenyl-4-ylmethyl-1-(2,2-dimethylpropionyl)-3-methylpyrrolidin-2-one

생성물 1

HCID 59318477(R)-5-Biphenyl-4-ylmethyl-1-(2,2-dimethylpropionyl)-3,3-dimethyl-pyrrolidin-2-one

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매

반응 조건

온도
-30 °C

실험 절차

10 g (3R,5S)-5-biphenyl-4-ylmethyl-1-(2,2-dimethylpropionyl)-3-methylpyrrolidin-2-one (2-a, R1=Piv) is added to THF (100 ml). The mixture is cooled to −30° C. Lithium diisopropylamide (17.16 ml, 2 M) is added and the mixture is stirred for 1 h. Methyl iodide (5.4 ml) is added and the mixture is stirred for 3 h. Aminoethylethanolamine (6.1 ml) is added and the mixture is warmed to 40° C. and stirred for 15 min. Sulphuric acid (12 g) is then added. The mixture is concentrated in vacuo and the residue taken up in toluene. The phases are separated. The organic phase is concentrated in vacuo and taken up in methanol (300 ml) at reflux. On cooling, the precipitate is collected by filtration to give (R)-5-Biphenyl-4-ylmethyl-1-(2,2-dimethylpropionyl)-3,3-dimethyl-pyrrolidin-2-one. 1H NMR (DMSO): 1.04 (3H), 1.15 (3H), 1.28 (9H), 1.72 (1H), 1.38 (1H), 2.59 (1H), 3.14 (1H), 4.37 (1H), 7.31 (3H), 7.45 (2H), 7.62 (4H).

후처리

  1. stirringthe mixture is stirred for 3 h
  2. temperaturethe mixture is warmed to 40° C.
  3. stirringstirred for 15 min
  4. concentrationThe mixture is concentrated in vacuo
  5. customThe phases are separated
  6. concentrationThe organic phase is concentrated in vacuo
  7. temperatureat reflux
  8. temperatureOn cooling
  9. filtrationthe precipitate is collected by filtration

출처 및 근거

ORD 기록
ord-a28ad0b570f341e5825e61dcd9128d59
출처 데이터셋
uspto-grants-2015_03
특허 번호
US08993785B2

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