3-Amino-2-(4-chloro-phenylethynyl)-benzoic acid methyl ester → 2-(4-Chloro-phenyl)-1H-indole-4-carboxylic acid methyl ester

HRID 33335

Reaktionsgleichung

[CH3:1][O:2][C:3](=[O:20])[C:4]1[CH:9]=[CH:8][CH:7]=[C:6]([NH2:10])[C:5]=1[C:11]#[C:12][C:13]1[CH:18]=[CH:17][C:16]([Cl:19])=[CH:15][CH:14]=1>C(#N)C.[Pd](Cl)Cl>[CH3:1][O:2][C:3]([C:4]1[C:5]2[CH:11]=[C:12]([C:13]3[CH:14]=[CH:15][C:16]([Cl:19])=[CH:17][CH:18]=3)[NH:10][C:6]=2[CH:7]=[CH:8][CH:9]=1)=[O:20]

Komponenten

Reaktionsbedingungen

Temperatur: 75 °C

Versuchsvorschrift

3-amino-2-(4-chloro-phenylethynyl)-benzoic acid methyl ester (0.73 g, 2.54 mmol) and palladium (II) chloride (23 mg, 0.13 mmol) were combined in 10 mL acetonitrile. The yellow solution was stirred under argon at 75° C. for 17 h. The solvent was removed in vacuo leaving an orange solid which was purified by flash chromatography eluting with 50 to 100% CH—Cl3/hecanes. 2-(4-chlorophenyl)-1H-indole-4-carboxylic acid methyl ester; 0.53 g (72%) was isolated as an off-white solid: m.p. 150.0-151.5° C.; 1H NMR (300 MHz, d6-DMSO) δ 3.93 (s, 3H), 7.23 (app t, J=7.8 Hz, 1H), 7.41 (d, J=1.8 Hz, 1H), 7.57 (d, J=8.7 Hz, 2H), 7.68 (d, J=7.8 Hz, 1H), 7.75 (dd, J=7.5, 0.9 Hz, 1H), 7.95 (d, J=8.7 Hz, 2H), 11.99 (br s, 1H). HRMS (MALDI, MH+) Calcd for C16H12ClNO2: 286.0635. Found: 286.0631.

Aufarbeitung

customThe solvent was removed in vacuo
customleaving an orange solid which
customwas purified by flash chromatography
washeluting with 50 to 100% CH—Cl3/hecanes
custom0.53 g (72%) was isolated as an off-white solid

Quellen und Nachweise

ORD-Eintrag: ord-92c4d5c2af1b469e84bbfddda61ed230
Quelldatensatz: uspto-grants-2008_09
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US07429578B2

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