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Site-specific hydroxyalkylation of chromones via alcohol mediated Minisci-type radical conjugate addition†
Rongzhen Chen,Jin-Tao Yu,Jiang Cheng
Organic & Biomolecular Chemistry Pub Date : 02/19/2018 00:00:00 , DOI:10.1039/C8OB00392K
Abstract

A metal-free site-specific C2-hydroxyalkylation of chromones through the Minisci-type reaction using simple alcohols was developed. This transformation proceeds via radical sp3 C–H activation and subsequent conjugate addition, generating a series of C2-hydroxyalkylated chromanones in moderate to good yields. Besides, ethers were also compatible in this Minisci reaction, leading to corresponding C2 ether-substituted chromanones.

Graphical abstract: Site-specific hydroxyalkylation of chromones via alcohol mediated Minisci-type radical conjugate addition
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