Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 143, Issue 33, Pages 12924-12929Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.1c05079
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Funding
- National Natural Science Foundation of China [21825105]
- Guangdong Provincial Key Laboratory of Catalysis [2020B121201002]
- Guangdong Innovative Program [2019BT02Y335]
- Shenzhen Special Funds [JCYJ20180305123508258, 20200812202943001]
- Shenzhen Nobel Prize Scientists Laboratory Project [C17213101]
- Principal Foundation of Shenzhen University [8570700000307]
- Project of Department of Education of Guangdong Province [2020KTSCX116]
- SUSTech Special Fund for the Construction of High-Level Universities [G02216402]
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This study reports a new strategy for catalytic enantioselective construction of axially chiral B-aryl-1,2-azaborines, achieving efficient stereochemical control through multiple hydrogen bonding interactions. The reaction demonstrates high efficiency, excellent enantioselectivity, shortened reaction duration, and high practicality with scalable reaction and facile cleavage of N-N bond in the product.
The previously elusive catalytic enantioselective construction of axially chiral B-aryl-1,2-azaborines with a C-B stereogenic axis has been realized through a chiral phosphoric acid-catalyzed desymmetrization strategy reported herein. The electrophilic aromatic substitution reaction of 3,5-disubsituted phenols with diazodicarboxamides could afford these axially chiral structures in good efficiency with excellent enantiocontrol. The efficient long-range stereochemical control is achieved by multiple well-defined H-bonding interactions between chiral phosphoric acid and both substrates. Meanwhile, the reaction duration could be markedly shortened with weakly acidic N-H in 1,2-azaborine acting as H-bond donor. The scalability of the reaction and facile cleavage of the N-N bond in the product further demonstrated the practicality of this method.
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