Methylparaben → 4-[5-Methyl-2-(4-trifluoromethyl-phenyl)-thiazol-4-ylethoxy]-benzoic acid methyl ester

HRID 253206

Reaktionsgleichung

Reaktionsgleichung von HRID 253206
[OH:1][CH2:2][CH2:3][C:4]1[N:5]=[C:6]([C:10]2[CH:15]=[CH:14][C:13]([C:16]([F:19])([F:18])[F:17])=[CH:12][CH:11]=2)[S:7][C:8]=1[CH3:9].[CH3:20][O:21][C:22](=[O:30])[C:23]1[CH:28]=[CH:27][C:26](O)=[CH:25][CH:24]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OCC)=O)=NC(OCC)=O>C1COCC1>[CH3:20][O:21][C:22](=[O:30])[C:23]1[CH:28]=[CH:27][C:26]([O:1][CH2:2][CH2:3][C:4]2[N:5]=[C:6]([C:10]3[CH:15]=[CH:14][C:13]([C:16]([F:19])([F:18])[F:17])=[CH:12][CH:11]=3)[S:7][C:8]=2[CH3:9])=[CH:25][CH:24]=1

Komponenten

6

Edukt 4

HCID 7456MethylparabenHCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 226474902-[5-Methyl-2-(4-trifluoromethyl-phenyl)-thiazol-4-yl]-ethanol

Produkt 1

HCID 579867424-[5-Methyl-2-(4-trifluoromethyl-phenyl)-thiazol-4-ylethoxy]-benzoic acid methyl ester

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

To a solution of 4-(2-hydroxy-ethyl)-5-methyl-2-(4-trifluoromethyl-phenyl)thiazole (Example 3, 288 mg, 1.0 mmol) in THF (3 mL) add 4-hydroxy-benzoic acid methyl ester (167 mg, 1.1 mmol) followed by triphenylphosphine (288 mg, 1.1 mmol). To this solution, add, dropwise, diethyl azodicarboxylate (174 μL, 1.1 mmol). On complete addition, stir the resulting red solution for 20 min. concentrate under reduced pressure and purify the residue by flash chromatography (elute with 15% ethyl acetate/15% dichloromethane in heptane) to give the title compound as a white solid. (410 mg).

Aufarbeitung

  1. additionTo this solution, add
  2. additionOn complete addition
  3. concentrationconcentrate under reduced pressure
  4. custompurify the residue
  5. washby flash chromatography (elute with 15% ethyl acetate/15% dichloromethane in heptane)

Quellen und Nachweise

ORD-Eintrag
ord-94a4d05db2fd43ba88eddf76f596e435
Quelldatensatz
uspto-grants-2011_01
Patentnummer
US07872032B2

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