Carbon-silicon-switch effect in enantioselective construction of silicon-stereogenic center from silacyclohexadienones

Yu Yan, Qi Wei, Zhishan Su (), Nan-Nan Hang, Tamio Hayashi () and Jialin Ming ()
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Yu Yan: Chengdu University
Qi Wei: Sichuan University
Zhishan Su: Sichuan University
Nan-Nan Hang: Inner Mongolia University
Tamio Hayashi: National Taiwan Normal University
Jialin Ming: Chengdu University

Nature Communications, 2024, vol. 15, issue 1, 1-13

Abstract: Abstract Carbon-silicon-switch strategy, replacing one specific carbon atom in organic molecules with a silicon, has garnered significant interest for developing new functional molecules. However, the influence of a reaction regarding its selectivity and reactivity by carbon-silicon-switch strategy has far less been investigated. Here we discover an unusual carbon-silicon-switch effect in the enantioselective construction of silicon-stereogenic center. It is found that there has been a significant change in the desymmetrization reaction of silacyclohexadienones using asymmetric conjugate addition or oxidative Heck reaction with aryl/alkyl nucleophiles when compared with their carbon analogues cyclohexadienones. Specifically, the carbon-silicon-switch leads to a reversal in enantioselectivity with arylzinc as the nucleophile by the same chiral catalyst, and results in totally different reactivity with arylboronic acid as the nucleophile. Control experiments and density functional theory (DFT) calculations have shown that the unusual carbon-silicon-switch effect comes from the unique stereoelectronic feature of silicon.

Date: 2024
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DOI: 10.1038/s41467-024-54241-x

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