10.1002/ejoc.201900128
European Journal of Organic Chemistry
COMMUNICATION
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leads to stabilization of both π-allyl-palladium complexes and σ-palladium
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.
Conclusions
In summary, we have presented the first palladium(II)-thiadiazole-
ligand catalytic system employing 1,3,4-thiadiazole derivative as ligand to
achieve the esterification of terminal olefin with excellent regio- and
stereoselectivity. The use of cheap and easily prepared 1,3,4-thiadiazole
ligand makes this transformation environmentally friendly and practical.
Further investigations of related reactions with monoterpenic alkenes, the
details of the reaction mechanism, including the density functional theory
(DFT) calculations of the catalytic cycle and single crystal X-ray diffraction
of the L5-palladium complex are currently underway by our group.
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Acknowledgements
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This work was supported by the National Natural Science
Foundation of China (21676252). We are also grateful to the
Collaborative Innovation Center of Yangtze River Delta Region
Green Pharmaceuticals for financial help.
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Keywords: palladium • thiadiazole ligand• terminal olefins •
allylic oxidation • regioselective
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