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o-Xylyl bromide → HCID 54269290, Verbindung

HRID 1901076
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1901076
[CH2:1]([O:8][C:9](=[O:23])[CH:10]1[CH2:15][CH2:14][N:13]([C:16]([O:18][C:19]([CH3:22])([CH3:21])[CH3:20])=[O:17])[CH2:12][CH2:11]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C[Si]([N-][Si](C)(C)C)(C)C.[Na+].Br[CH2:35][C:36]1[C:37]([CH3:42])=[CH:38][CH:39]=[CH:40][CH:41]=1>C1COCC1>[CH2:1]([O:8][C:9](=[O:23])[C:10]1([CH2:35][C:36]2[CH:41]=[CH:40][CH:39]=[CH:38][C:37]=2[CH3:42])[CH2:11][CH2:12][N:13]([C:16]([O:18][C:19]([CH3:20])([CH3:22])[CH3:21])=[O:17])[CH2:14][CH2:15]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1
KomponentenReaktionsbedingungenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

5

Edukt 3

HCID 6992o-Xylyl bromideHCID 2724254Sodium bis(trimethylsilyl)amideHCID 222559134-Benzyl 1-tert-butyl piperidine-1,4-dicarboxylate

Produkt 1

HCID 54269290HCID 54269290, Verbindung

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel2×

Reaktionsbedingungen

Temperatur
-78 °C

Versuchsvorschrift

To a cold (-78° C.) solution of N-t-butoxycarbonyl isonipecotic acid benzyl ester (13.34 g, 41.8 mmol) in 140 ml of dry THF was added a 1.0 M THF solution of sodium bis trimethysilylamide (59 ml, 59 mmol) over 15 min. The resulting orange solution was stirred at -78° C. for 1 h and then treated dropwise with α-bromo-o-xylene (6.8 ml, 50.7 mmol) and then allowed to warm slowly to room temp. overnight. The reaction was quenched with saturated aqueous NH4Cl, diluted with H2O, and extracted with EtOAc (2×). The combined organic extracts were washed with brine (2×), and concentrated in vacuo to an orange gum. Flash chromatography on silica with 20% to 30% EtOAc/hexane as eluent, combining appropriate fractions, and concentrating in vacuo, afforded the product as a white solid.

Aufarbeitung

  1. temperatureto warm slowly to room temp. overnight
  2. customThe reaction was quenched with saturated aqueous NH4Cl
  3. additiondiluted with H2O
  4. extractionextracted with EtOAc (2×)
  5. washThe combined organic extracts were washed with brine (2×)
  6. concentrationconcentrated in vacuo to an orange gum
  7. concentrationconcentrating in vacuo

Quellen und Nachweise

ORD-Eintrag
ord-73fe703b86404613b9048af86ee66577
Quelldatensatz
uspto-grants-1996_11
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US05576313

Notizen zur Reaktion

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