期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 15, 期 29, 页码 7238-7245出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.200900583
关键词
diazo compounds; Heck reaction; one-pot reactions; palladium; sustainable chemistry
资金
- Universite de Bordeaux
- Centre National de la Recherche Scientifique (CNRS)
One-pot sequential Heck reduction-cyclization (HRC) reactions leading to the synthesis of substituted 2-quinolones have been developed by using a heterogeneous or mixed homogeneous/heterogeneous multitask palladium catalyst with charcoal as a support. The whole sequence occurs under very mild conditions without the need for additives (ligand or base) by taking advantage of the high reactivity of aryldiazonium salts as super electrophiles. Recycling experiments showed that the reused heterogeneous Pd-0/C catalyst was not able to promote another HRC sequence but was, however, still highly active for hydrogenation, hydrodehalogenation, as well as hydrogenolysis reactions.
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