Cesium carbonate → 4-{[(2,4-Dimethoxy-benzyl)-ethoxycarbonylmethyl-amino]-methyl}-2-(2-methoxy-phenyl)-thiazole-5-carboxylic acid ethyl ester

HRID 642351Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 642351
[CH2:1]([O:3][C:4]([C:6]1[S:10][C:9](Br)=[N:8][C:7]=1[CH2:12][N:13]([CH2:20][C:21]1[CH:26]=[CH:25][C:24]([O:27][CH3:28])=[CH:23][C:22]=1[O:29][CH3:30])[CH2:14][C:15]([O:17][CH2:18][CH3:19])=[O:16])=[O:5])[CH3:2].[CH3:31][O:32][C:33]1[CH:38]=[CH:37][CH:36]=[CH:35][C:34]=1B(O)O.C(=O)([O-])[O-].[Cs+].[Cs+]>O1CCOCC1.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH2:1]([O:3][C:4]([C:6]1[S:10][C:9]([C:34]2[CH:35]=[CH:36][CH:37]=[CH:38][C:33]=2[O:32][CH3:31])=[N:8][C:7]=1[CH2:12][N:13]([CH2:20][C:21]1[CH:26]=[CH:25][C:24]([O:27][CH3:28])=[CH:23][C:22]=1[O:29][CH3:30])[CH2:14][C:15]([O:17][CH2:18][CH3:19])=[O:16])=[O:5])[CH3:2]

Komponenten

6

Edukt 3

HCID 10796Cesium carbonateHCID 27339582-Methoxyphenylboronic acidHCID 684264542-Bromo-4-{[(2,4-dimethoxy-benzyl)-ethoxycarbonylmethyl-amino]-methyl}-thiazole-5-carboxylic acid ethyl ester

Produkt 1

HCID 684268954-{[(2,4-Dimethoxy-benzyl)-ethoxycarbonylmethyl-amino]-methyl}-2-(2-methoxy-phenyl)-thiazole-5-carboxylic acid ethyl esterAusbeute 135,8 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 178418397HCID 178418397, VerbindungKatalysatorHCID 312751,4-DioxaneLösungsmittel

Versuchsvorschrift

A mixture of 2-bromo-4-{[(2,4-dimethoxy-benzyl)-ethoxycarbonylmethyl-amino]-methyl}-thiazole-5-carboxylic acid ethyl ester (747 mg, 1.49 mmole), 2-methoxyphenylboronic acid (663.3 mg, 4.36 mmole), cesium carbonate (2.13 g, 4.76 mmole) and tetrakis(triphenylphosphine)palladium (252 mg, 0.16 mmole) in dioxane (7 ml) was refluxed for 5 h before it was cooled to room temperature, quenched with water and filtered. The filtrate was partitioned between ethyl acetate and water. The organic layer was washed with brine, dried over anhydrous sodium sulfate and concentrated in vacuo. The residue was purified by flash column chromatography on silica gel with a gradient of ethyl acetate and hexanes to give the title compound as a yellow oil (1.07 g). MS: (+) m/z 551.20 (M+Na+)

Aufarbeitung

  1. temperaturewas refluxed for 5 h before it
  2. customquenched with water
  3. filtrationfiltered
  4. customThe filtrate was partitioned between ethyl acetate and water
  5. washThe organic layer was washed with brine
  6. dry with materialdried over anhydrous sodium sulfate
  7. concentrationconcentrated in vacuo
  8. customThe residue was purified by flash column chromatography on silica gel with a gradient of ethyl acetate and hexanes

Quellen und Nachweise

ORD-Eintrag
ord-764981e6b8634bdaa411faa078a7ea27
Quelldatensatz
uspto-grants-2010_04
Patentnummer
US07696223B2

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