Competing Dehalogenation versus Borylation of Aryl Iodides and Bromides under Transition-Metal-Free Basic Conditions

In this work, selectivity-controllable base-promoted transition-metal-free borylation and dehalogenation of aryl halides are described. Under the conditions of borylation, the dehalogenation which emerges as a competitive side reaction has been well-controlled by carefully controlling the borylation...

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Published inJournal of organic chemistry Vol. 84; no. 17; pp. 10805 - 10813
Main Authors Niu, Yi-Jie, Sui, Guo-Hui, Zheng, Hong-Xing, Shan, Xiang-Huan, Tie, Lin, Fu, Jia-Le, Qu, Jian-Ping, Kang, Yan-Biao
Format Journal Article
LanguageEnglish
Published WASHINGTON American Chemical Society 06.09.2019
Amer Chemical Soc
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Abstract In this work, selectivity-controllable base-promoted transition-metal-free borylation and dehalogenation of aryl halides are described. Under the conditions of borylation, the dehalogenation which emerges as a competitive side reaction has been well-controlled by carefully controlling the borylation conditions. On the other hand, the dehalogenation using benzaldehyde as a hydrogen source has also been accomplished. The applications of direct radical borylation and dehalogenation of aryl halides demonstrate their synthetic practicability in pharmaceutical-oriented organic synthesis. Based on the experimental evidences, the t BuOK/1,10-Phen-triggered radical nature of both competitive reactions has been revealed.
AbstractList In this work, selectivity-controllable base-promoted transition-metal-free borylation and dehalogenation of aryl halides are described. Under the conditions of borylation, the dehalogenation which emerges as a competitive side reaction has been well-controlled by carefully controlling the borylation conditions. On the other hand, the dehalogenation using benzaldehyde as a hydrogen source has also been accomplished. The applications of direct radical borylation and dehalogenation of aryl halides demonstrate their synthetic practicability in pharmaceutical-oriented organic synthesis. Based on the experimental evidences, the t BuOK/1,10-Phen-triggered radical nature of both competitive reactions has been revealed.
In this work, a selectivity-controllable base-promoted transition metal-free borylation and dehalogenation of aryl halides are described. Under the conditions of borylation, the dehalogenation which emerges as a competitive side-reaction has been well-controlled by carefully controlling the borylation conditions. On the other hand, the dehalogenation using benzaldehyde as hydrogen source has also been accomplished. The applications of direct radical borylation and dehalogenation of aryl halides demonstrate their synthetic practicability in pharmaceutical-oriented organic synthesis. Based on the experimental evidences, the tBuOK/1,10-Phen triggered radical nature of both competitive reactions has been revealed.
In this work, selectivity-controllable base-promoted transition-metal-free borylation and dehalogenation of aryl halides are described. Under the conditions of borylation, the dehalogenation which emerges as a competitive side reaction has been well-controlled by carefully controlling the borylation conditions. On the other hand, the dehalogenation using benzaldehyde as a hydrogen source has also been accomplished. The applications of direct radical borylation and dehalogenation of aryl halides demonstrate their synthetic practicability in pharmaceutical-oriented organic synthesis. Based on the experimental evidences, the (BuOK)-Bu-t/1,10-Phen-triggered radical nature of both competitive reactions has been revealed.
Author Shan, Xiang-Huan
Fu, Jia-Le
Kang, Yan-Biao
Zheng, Hong-Xing
Niu, Yi-Jie
Tie, Lin
Sui, Guo-Hui
Qu, Jian-Ping
AuthorAffiliation Department of Chemistry
Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials
School of Chemistry and Chemical Engineering
Liaocheng University
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Issue 17
Keywords PALLADIUM
CROSS-COUPLING REACTIONS
ELECTRON
ACTIVATION
REDUCTION
SECONDARY
ORGANIC HALIDES
COPPER-CATALYZED BORYLATION
ALKOXY DIBORON REAGENTS
ALKYL-HALIDES
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Snippet In this work, selectivity-controllable base-promoted transition-metal-free borylation and dehalogenation of aryl halides are described. Under the conditions of...
In this work, a selectivity-controllable base-promoted transition metal-free borylation and dehalogenation of aryl halides are described. Under the conditions...
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SubjectTerms Chemistry
Chemistry, Organic
Physical Sciences
Science & Technology
Title Competing Dehalogenation versus Borylation of Aryl Iodides and Bromides under Transition-Metal-Free Basic Conditions
URI http://dx.doi.org/10.1021/acs.joc.9b01350
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https://www.ncbi.nlm.nih.gov/pubmed/31418570
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