Journal
CHEM CATALYSIS
Volume 2, Issue 1, Pages 164-177Publisher
CELL PRESS
DOI: 10.1016/j.checat.2021.12.008
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Funding
- National Natural Science Foundation of China [21901178, 21871053]
- Natural Science Foundation of Zhejiang Province [LY21B020002]
- Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang [2019R01005]
- Open Research Fund of School of Chemistry and Chemical Engineering, Henan Normal University [2020ZD04]
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A photo-promoted, three-component, asymmetric free radical reaction has been developed for the synthesis of axially chiral compounds with high enantioselectivity. This method shows great potential for various applications.
The wide applicability in various fields enables development of novel methods to access axially chiral styrenes to be of significance. Among the developed and potential synthetic strategies for this type of framework, the route based on an asymmetric radical process is more challenging and has not been achieved so far. Here we report a photo-promoted, three- component, asymmetric free radical reaction of potassium alkyltrifluoroborates, potassium metabisulfite, and 1-alkynylnaphthalen-2- ols, delivering axially chiral (S, E)-1-(1-(alkylsulfonyl)-2-vinyl)naphthalen-2- ols with excellent enantioselectivity (93%-99% enantiomeric excess) and good yield (up to 97%). The transformation involves in situ generation of alkylsulfonyl radicals, tandem enantioselective radical addition, and a reduction process of radical species.
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