期刊
ADVANCED SYNTHESIS & CATALYSIS
卷 352, 期 17, 页码 2979-2992出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adsc.201000606
关键词
alkynes; homogeneous catalysis; nickel complexes; phosphorylation; selectivity
资金
- Russian Foundation for Basic Research [07-03-00851]
- Division of Chemistry and Material Sciences of RAS [1]
- RAS [20]
The nickel catalyst prepared in situ from nickel bis(acetylacetonate) [Ni(acac)(2)] precursor and bis(diphenylphosphino) ethane (DPPE) ligand has shown excellent performance in the hydrophosphorylation of alkynes. Markovnikov-type regioselective addition to terminal alkynes and stereoselective addition to internal alkynes were carried out with high selectivity without an acidic co-catalyst (in contrast to the palladium/acid catalytic system). Various H-phosphonates and alkynes reacted smoothly in the developed catalytic system with up to 99% yield. The mechanisms of catalyst activation and C-P bond formation were revealed by experimental (NMR, ESI-MS, X-ray) and theoretical (density functional calculations) studies. Two different pathways of the alkyne insertion in the coordination sphere of the metal are reported for the first time.
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