Ammonium Chloride → N-(3-Azido-5-fluoropyridin-2-yl)-2,2-dimethylpropanamide

HRID 493602

Reaktionsgleichung

Reaktionsgleichung von HRID 493602
[F:1][C:2]1[CH:3]=[CH:4][C:5]([NH:8][C:9](=[O:14])[C:10]([CH3:13])([CH3:12])[CH3:11])=[N:6][CH:7]=1.C([Li])(C)(C)C.C(C1C=CC(S([N:41]=[N+:42]=[N-:43])(=O)=O)=CC=1)CCCCCCCCCCC.[NH4+].[Cl-]>O1CCCC1>[N:41]([C:4]1[C:5]([NH:8][C:9](=[O:14])[C:10]([CH3:11])([CH3:13])[CH3:12])=[N:6][CH:7]=[C:2]([F:1])[CH:3]=1)=[N+:42]=[N-:43]

Komponenten

6

Edukt 4

HCID 25517Ammonium ChlorideHCID 109151434-Dodecylbenzenesulfonyl azideHCID 22293237N-(5-Fluoropyridin-2-yl)pivalamideHCID 178418306HCID 178418306, Verbindung

Produkt 1

HCID 22293288N-(3-Azido-5-fluoropyridin-2-yl)-2,2-dimethylpropanamideAusbeute 17 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

To a −78° C. solution of N-(5-fluoropyridin-2-yl)-2,2-dimethylpropanamide (1.34 g, 6.83 mmol) in tetrahydrofuran (25 mL) was added tert-butyllithium (1.31 mL of a 1.7 M solution, 20.5 mmol) drop wise. After 3 h at −78° C., 4-dodecylbenzenesulfonyl azide (3.60 g, 10.2 mmol) was added at the reaction was allowed to warm to room temperature. After 1 h, saturated aqueous NH4Cl was added, and the tetrahydrofuran was removed via rotary evaporator. Dichloromethane was added, the layers separated and the aqueous phase backwashed with DCM. The combined organics were dried over magnesium sulfate, filtered and concentrated and the residue purified by two successive silica gel chromatographies (10%→80% EtOAc/hexanes, then 5%→42% EtOAc/hexanes) to give the title compound (0.275 g). MS 234.0 (M+1).

Aufarbeitung

  1. waitAfter 1 h
  2. customthe tetrahydrofuran was removed via rotary evaporator
  3. additionDichloromethane was added
  4. customthe layers separated
  5. dry with materialThe combined organics were dried over magnesium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customthe residue purified by two successive silica gel chromatographies (10%→80% EtOAc/hexanes

Quellen und Nachweise

ORD-Eintrag
ord-221d8b8b440d4c45ba5e9ffec9428080
Quelldatensatz
uspto-grants-2009_05
Patentnummer
US07534784B2

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