1,2-Boron Shifts of β-Boryl Radicals Generated from Bis-boronic Esters Using Photoredox Catalysis.
1,2-Boron Shifts of β-Boryl Radicals Generated from Bis-boronic Esters Using Photoredox Catalysis.
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DOI:
10.1021/jacs.9b07564
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发表时间:
2019-09-11
影响因子:
15
通讯作者:
Aggarwal VK
中科院分区:
文献类型:
--
作者:
Kaiser D;Noble A;Fasano V;Aggarwal VK
1,2-Bis-boronic esters are versatile intermediates that enable the rapid elaboration of simple alkene precursors. Previous reports on their selective mono-functionalization have targeted the most accessible position, retaining the more hindered secondary boronic ester. In contrast, we have found that photoredox-catalyzed mono-deboronation generates primary β-boryl radicals that undergo rapid 1,2-boron shift to form thermodynamically favored secondary radicals, allowing for selective transformation of the more hindered boronic ester. The pivotal 1,2-boron shift, which has been demonstrated to be stereoretentive, enables access to a wide range of functionalized boronic esters and has been applied to highly diastereoselective fragmentation and transannular cyclization reactions. Furthermore, its generality has been shown in a radical cascade reaction with an allylboronic ester.
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DOI:
10.1002/anie.201608406
发表时间:
2016-11-14
期刊:
Angewandte Chemie (International ed. in English)
影响因子:
--
作者:
Fawcett A;Nitsch D;Ali M;Bateman JM;Myers EL;Aggarwal VK
通讯作者:
Aggarwal VK
DOI:
10.1021/acs.joc.6b01207
发表时间:
2016-08-19
期刊:
The Journal of organic chemistry
影响因子:
--
作者:
Heitz DR;Rizwan K;Molander GA
通讯作者:
Molander GA
影响因子:
15
作者:
Huo, Haohua;Harms, Klaus;Meggers, Eric
通讯作者:
Meggers, Eric
影响因子:
3.2
作者:
Bonet, Amadeu;Sole, Cristina;Fernandez, Elena
通讯作者:
Fernandez, Elena
影响因子:
15
作者:
CHEN, KS;ELSON, IH;KOCHI, JK
通讯作者:
KOCHI, JK