Triethylamine → 5-Chloro-7-nitro-3-phenyl-2-trimethylsilyl-1H-indole

2-Amino-5-chloro-3-nitro-phenyliodide (1.5 g, 4.90 mmol) prepared in Preparation 19 and 1-phenyl-2-trimethylsilylacetylene (4.3 g, 24.50 mmol) were dissolved in DMF (50 mL). Palladium acetate (0.11 g, 0.5 mmol), lithium chloride (0.21 g, 4.90 mmol) and triethylamine (2.48 g, 24.50 mmol) were added thereto, and the mixture was stirred under heating for 3 h to 100° C. After completion of the reaction, water was added to the reaction mixture, which was then extracted with ethyl acetate, washed with saturated aqueous sodium chloride solution, dried over anhydrous magnesium sulfate, and filtered. The solvent was removed under reduced pressure, and the residue was purified by column chromatography to give the title compound (1.05 g, Yield 87%).

1. temperatureunder heating for 3 h to 100° C
2. additionwas added to the reaction mixture, which
3. extractionwas then extracted with ethyl acetate
4. washwashed with saturated aqueous sodium chloride solution
5. dry with materialdried over anhydrous magnesium sulfate
6. filtrationfiltered
7. customThe solvent was removed under reduced pressure
8. customthe residue was purified by column chromatography

ORD-Eintrag

ord-454d6715af1d47f3b1683a6887e21231

Quelldatensatz

uspto-grants-2013_05

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08436038B2