Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 53, Issue 35, Pages 9329-9333Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201404355
Keywords
amination; aryl sulfides; N-heterocyclic carbene ligands; palladium; Pummerer reaction
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Funding
- MEXT [24106721, 25107002]
- JSPS [24685007, 23655037, 26620081]
- Grants-in-Aid for Scientific Research [24685007, 26620081, 23655037, 25620031, 25107002] Funding Source: KAKEN
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A combination of a palladium-NHC catalyst and potassium hexamethyldisilazide enables the amination of aryl sulfides with anilines to afford a wide variety of diarylamines. The reaction conditions are versatile enough for the reaction of even bulky ortho-substituted aryl sulfides. This amination can be applied to the modular synthesis of N-aryl carbazoles from the corresponding ortho-bromothioanisoles. As aryl sulfoxides undergo extended Pummerer reactions to afford ortho-substituted aryl sulfides, the Pummerer products are thus useful substrates for the amination to culminate in efficient syntheses of a 2-anilinobenzothiophene and an indole as proof-ofprinciple of the utility of the extended Pummerer reaction/amination cascade.
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