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Magnesium → (2S,4R)-2-methyl 1-(2-(trimethylsilyl)ethyl) 4-hydroxy-4-(2-vinylbiphenyl-4-yl)pyrrolidine-1,2-dicarboxylate

HRID 1043417
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Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1043417
[CH:1]([C:3]1[CH:8]=[C:7]([Mg]Br)[CH:6]=[CH:5][C:4]=1[C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1)=[CH2:2].BrC1C=CC(C2C=CC=CC=2)=C(C=C)C=1.[Mg].[O:33]=[C:34]1[CH2:38][N:37]([C:39]([O:41][CH2:42][CH2:43][Si:44]([CH3:47])([CH3:46])[CH3:45])=[O:40])[C@H:36]([C:48]([O:50][CH3:51])=[O:49])[CH2:35]1>C1COCC1.C1(C)C=CC=CC=1>[OH:33][C@:34]1([C:7]2[CH:6]=[CH:5][C:4]([C:11]3[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=3)=[C:3]([CH:1]=[CH2:2])[CH:8]=2)[CH2:38][N:37]([C:39]([O:41][CH2:42][CH2:43][Si:44]([CH3:46])([CH3:47])[CH3:45])=[O:40])[C@H:36]([C:48]([O:50][CH3:51])=[O:49])[CH2:35]1
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Komponenten

7

Edukt 4

HCID 5462224MagnesiumHCID 59266363(S)-2-methyl 1-(2-(trimethylsilyl)ethyl) 4-oxopyrrolidine-1,2-dicarboxylateHCID 592665654-Bromo-2-vinylbiphenylHCID 178436727HCID 178436727, Verbindung

Produkt 1

HCID 59266520(2S,4R)-2-methyl 1-(2-(trimethylsilyl)ethyl) 4-hydroxy-4-(2-vinylbiphenyl-4-yl)pyrrolidine-1,2-dicarboxylate
Ausbeute 18,2 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 1140TolueneLösungsmittelHCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

(2-vinylbiphenyl-4-yl)magnesium bromide (2.66 g, 9.38 mmol) solution, made by refluxing Intermediate 7 with 1 eq. of magnesium turnings in THF, was added to a solution of (S)-2-methyl 1-(2-(trimethylsilyl)ethyl) 4-oxopyrrolidine-1,2-dicarboxylate (2.7 g, 9.38 mmol) in toluene (75 mL) at 0° C. and stirred for 1 hr and then quenched with sat. NH4Cl solution. The aqueous layer was extracted with DCM and the combined organics were dried, filtered and evaporated to give crude material. The crude material was purified by flash chromatography on the Biotage (20-33% EtOAc:Hex) to give (2S,4R)-2-methyl 1-(2-(trimethylsilyl)ethyl) 4-hydroxy-4-(2-vinylbiphenyl-4-yl)pyrrolidine-1,2-dicarboxylate (800 mg, 1.711 mmol, 18% yield). LCMS: rt=1.85 min. [M+Na]+=490; Phenomenex-Luna C-18 (5μ) (3.0×50 mm); Solvent A=10% acetonitrile—90% water—0.1% TFA, Solvent B=90% acetonitrile—10% water—0.1% TFA; gradient 0% to 100% solvent B over 2 min. and then hold for 1 min.; 4 mL/min; inj. vol.=5 uL; wavelength=220.

Aufarbeitung

  1. customquenched with sat. NH4Cl solution
  2. extractionThe aqueous layer was extracted with DCM
  3. customthe combined organics were dried
  4. filtrationfiltered
  5. customevaporated
  6. customto give crude material
  7. customThe crude material was purified by flash chromatography on the Biotage (20-33% EtOAc:Hex)

Quellen und Nachweise

ORD-Eintrag
ord-69401695749b4dc888495a057dc6487c
Quelldatensatz
uspto-grants-2013_10
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08563505B2

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