N,N,N',N'-Tetramethylethylenediamine → 6-(2,5-dimethyl-1H-pyrrol-1-yl)-4-methyl-2-pyridinebutanamine

HRID 2180102Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2180102
[CH3:1][C:2]1[N:3]([C:8]2[CH:13]=[C:12]([CH3:14])[CH:11]=[C:10]([CH3:15])[N:9]=2)[C:4]([CH3:7])=[CH:5][CH:6]=1.[NH2:16][C:17]1N=C(C)C=[C:19](C)[CH:18]=1.CN(CCN(C)C)C.[Li]CCCC.BrCCCN1[Si](C)(C)CC[Si]1(C)C.[Cl-].[NH4+]>C(OCC)C.CCCCCC>[CH3:7][C:4]1[N:3]([C:8]2[N:9]=[C:10]([CH2:15][CH2:19][CH2:18][CH2:17][NH2:16])[CH:11]=[C:12]([CH3:14])[CH:13]=2)[C:2]([CH3:1])=[CH:6][CH:5]=1

Komponenten

9

Edukt 6

HCID 8037N,N,N',N'-TetramethylethylenediamineHCID 215072-Amino-4,6-dimethylpyridineHCID 25517Ammonium ChlorideHCID 42924111-(3-Bromoprop-1-yl)-2,2,5,5-tetramethyl-1,2,5-azadisilolidineHCID 224907362-(2,5-Dimethyl-1H-pyrrol-1-yl)-4,6-dimethylpyridineHCID 178418339Butyllithium

Produkt 1

HCID 224907456-(2,5-dimethyl-1H-pyrrol-1-yl)-4-methyl-2-pyridinebutanamineAusbeute 62 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 3283Diethyl EtherLösungsmittelHCID 8058HexaneLösungsmittel

Reaktionsbedingungen

Temperatur
-20 °C

Versuchsvorschrift

1 g (5 mmol) of 2-(2,5-dimethyl-1H-pyrrol-1-yl)-4,6-dimethylpyridine (prepared from the 6-amino-2,4-lutidine according to J. Chem. Soc., Perkin Trans., 1984, 12, 2801) is dissolved, under an argon atmosphere, in 10 ml of anhydrous ethyl ether and 1.132 ml (7.5 mmol) of N,N,N,N-tetramethylethylenediamine (TMEDA). The reaction mixture is cooled down to −20° C. and 2.4 ml (6 mmol) of a 2.5 M solution of BuLi in hexane is added dropwise. After 5 hours at −20° C., the reaction mixture is cooled down to −45° C. and 1.68 g (6 mmol) of 1-(3-bromopropyl)-2,2,5,5-tetramethyl-1-aza-2,5-disilacyclopentane is added and the temperature is allowed to return to ambient temperature overnight. 50 ml of a saturated solution of ammonium chloride is added and the mixture is agitated for 2 hours at 25° C. The organic phase is decanted and washed successively with 40 ml of water and 40 ml of salt water, dried over magnesium sulphate, filtered and concentrated under vacuum. The residue obtained is purified on a silica column (eluent=dichloromethane with 5% ethanol) in order to produce a yellow oil with a yield of 62%.

Aufarbeitung

  1. temperaturethe reaction mixture is cooled down to −45° C.
  2. waitto return to ambient temperature overnight
  3. customThe organic phase is decanted
  4. washwashed successively with 40 ml of water and 40 ml of salt water
  5. dry with materialdried over magnesium sulphate
  6. filtrationfiltered
  7. concentrationconcentrated under vacuum
  8. customThe residue obtained
  9. customis purified on a silica column (eluent=dichloromethane with 5% ethanol) in order
  10. customto produce a yellow oil with a yield of 62%

Quellen und Nachweise

ORD-Eintrag
ord-1960476f855a49909fba1f51b8c2b9c0
Quelldatensatz
uspto-grants-2005_05
Patentnummer
US06887891B2

Notizen zur Reaktion

Wird geladen…