Imidazole → Dechloroclotrimazole

HRID 1016698Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1016698
[C:1](Cl)([C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[NH:21]1[CH:25]=[CH:24][N:23]=[CH:22]1.C(N(CC)CC)C>C(Cl)Cl>[C:1]([N:21]1[CH:25]=[CH:24][N:23]=[CH:22]1)([C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Komponenten

5

Edukt 3

HCID 795ImidazoleHCID 6456Trityl chlorideHCID 8471Triethylamine

Produkt 1

HCID 618231DechloroclotrimazoleAusbeute 90,2 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel2×

Versuchsvorschrift

To a solution of trityl chloride (5.58 g, 20.0 mmol.) in dry methylene chloride (100 ml) cooled down to 0° C. and stirred under Ar, was added dropwise over 1.5 hours a solution of imidazole (1.36 g, 20.0 mmol.) and triethylamine (2.7 mml, 20 mmol.) in 50 ml dry methylene chloride. At the end of the addition, the reaction mixture was allowed to warm up to room temperature and stirred under Ar at that temperature overnight. The reaction mixture was then washed with 20 ml of a 10% solution of ammonium chloride, then with 20 ml of distilled water. The organic phase was dried over magnesium sulfate and evaporated in vacuo to yield quantitatively a white solid. Recrystallization from methylene chloride/hexanes yielded 5.60 g of (5) (yield=90% after recrystallization). m.p. 214° C.; 1H NMR (200 MHz, CDCl3) δ7.43 (m, 1H, NCHN), 7.3-7.4 (m, 9H, 3×C6H5), 7.1-7.2 (m, GH, 3×C6H5), 7.0 (m, 1H, Ph3CNCH═CH), 6.81 (m, 1H, Ph3CNCH═CH); 13C NMR (50 MHz, CDCl3) δ142.3, 139.0, 129.6, 128.2, 128.3, 121.6.

Aufarbeitung

  1. additionAt the end of the addition
  2. stirringstirred under Ar at that temperature overnight
  3. washThe reaction mixture was then washed with 20 ml of a 10% solution of ammonium chloride
  4. dry with materialThe organic phase was dried over magnesium sulfate
  5. customevaporated in vacuo
  6. customto yield quantitatively a white solid
  7. customRecrystallization from methylene chloride/hexanes

Quellen und Nachweise

ORD-Eintrag
ord-2f0806e52de04cf6b01fae82fbef1a70
Quelldatensatz
uspto-grants-2002_11
Patentnummer
US06476216B1

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