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Preparation and Use of Carbonyl-decorated Carbenes in the Activation of White Phosphorus
Published on: October 3, 2014
Electrochemically driven regioselective C-H phosphorylation of group 8 metallocenes
Hao Zheng1,2, Chang-Hui Liu1,2, Shi-Yu Guo1
1Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China.
Electrochemical C-H phosphorylation of metallocenes offers a regioselective synthesis. This method overcomes reactivity challenges in functionalizing unsymmetric metallocenes, providing a new route for phosphorylated metallocene preparation.
Area of Science:
- Organometallic Chemistry
- Catalysis
- Synthetic Chemistry
Background:
- Metallocenes are versatile scaffolds in synthesis and catalysis.
- Direct dehydrogenative C-H functionalization of unsymmetric metallocenes presents significant reactivity and selectivity challenges.
Purpose of the Study:
- To develop an efficient and regioselective method for the C-H phosphorylation of group 8 metallocenes.
- To investigate the mechanism of electrochemically driven C-H functionalization.
Main Methods:
- Electrochemical oxidation was employed to drive the C-H phosphorylation reaction.
- Mechanistic studies were conducted to elucidate the reaction pathway.
Main Results:
- Regioselective C-H phosphorylation of group 8 metallocenes was achieved electrochemically.
- The reaction proceeds via an electrophilic radical substitution mechanism involving a phosphoryl radical.
- An efficient and divergent synthesis of phosphorylated metallocenes was established.
Conclusions:
- Electrochemical C-H phosphorylation provides a novel and effective route to functionalized metallocenes.
- The findings offer insights into controlling reactivity and regioselectivity in metallocene C-H functionalization.
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