Methanol → 4-[[(Diisopropylamino)methylene]amino]-3-pyridinol N,N-dimethyl carbamate

HRID 399410

Reaktionsgleichung

Reaktionsgleichung von HRID 399410
[CH:1]([N:4]([CH:8]=[N:9][C:10]1[CH:15]=[CH:14][N:13]=[CH:12][C:11]=1[OH:16])[CH:5]([CH3:7])[CH3:6])([CH3:3])[CH3:2].C(N(CC)CC)C.[CH3:24][N:25]([CH3:29])[C:26](Cl)=[O:27].CO>CCOCC.C(Cl)Cl>[CH3:24][N:25]([CH3:29])[C:26]([O:16][C:11]1[CH:12]=[N:13][CH:14]=[CH:15][C:10]=1[N:9]=[CH:8][N:4]([CH:5]([CH3:7])[CH3:6])[CH:1]([CH3:2])[CH3:3])=[O:27]

Komponenten

7

Edukt 4

HCID 887MethanolHCID 6598Dimethylcarbamoyl ChlorideHCID 8471TriethylamineHCID 153809314-[[(Diisopropylamino)methylene]amino]-3-pyridinol

Produkt 1

HCID 677490834-[[(Diisopropylamino)methylene]amino]-3-pyridinol N,N-dimethyl carbamate

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 3283Diethyl EtherLösungsmittel2×HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

To a stirred mixture of 4-[[(diisopropylamino)methylene]amino]-3-pyridinol (1.06 g) and triethylamine (1.0 ml) in 25 ml dry Et2O was added dimethyl carbamyl chloride (0.53 ml). The mixture was stirred at room temperature for 2 hours, after which no starting material remained as seen by TLC (silica, 10:90 CH3OH:CH2Cl2). The mixture was diluted with 25 ml Et2O, filtered, washed with Et2O, and the filtrate concentrated in vacuo and chromatography on silica using EtOAc eluent. The fractions containing desired product were combined and concentrated to provide 500 mg of pure product. Another run was carried out in the same manner as above using 740 mg of starting material. The products from both runs were combined. Recrystallization attempts failed, and the product was dried in vacuo to provide 790 mg of a white solid, m.p. 76°-79° C.

Aufarbeitung

  1. filtrationfiltered
  2. washwashed with Et2O
  3. concentrationthe filtrate concentrated in vacuo and chromatography on silica
  4. additionThe fractions containing desired product
  5. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-8e4e4814a5c44f3bad47ba701a7928ff
Quelldatensatz
uspto-grants-1998_10
Patentnummer
US05821239

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