期刊
ADVANCED SYNTHESIS & CATALYSIS
卷 358, 期 14, 页码 2324-2331出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adsc.201600382
关键词
cyclization; lactams; lactones; pincer complexes; platinum
资金
- Centre National de la Recherche Scientifique
- Universite de Toulouse
- Agence Nationale de la Recherche (ANR) [CE6-CYCLOOP]
- Consejo Nacional de Cienca y tecnologia (CONACYT)
- Chinese Scholarship Council (CSC)
Platinum pincer complexes featuring an SCS indenediide backbone have been prepared and evaluated in the catalytic cycloisomerization of alkynoic acids and N-tosyl alkynylamides. One of the platinum complexes significantly outperforms its palladium analogue for the formation of 6- and 7-membered rings. The catalytic system takes advantage of the alkynophilicity of Pt and of the non-innocent character of the indenediide framework. Like for Pd, the catalytic performance is significantly improved by using an H-bond donor additive such as pyrogallol. For the first time, a large variety of omega-unsaturated delta- and epsilon-lactones/lactams could be prepared with high selectivities and in very good yields.
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