Synthesis of functionalized chromones via organocatalysis
作者:Sai-Shuai Wen、Jing Wang、Yi-Ming Luo、Hua Yang
DOI:10.1016/j.tet.2014.10.045
日期:2014.12
A facile and versatile organocatalytic approach to access 2-substituted and 2,3-disubstituted chromone derivatives under mild conditions was developed, which was effectively catalyzed by novel proline phenylsulphonylhydrazide or pyrrolidine. As a result, diversely functionalized chromones were obtained in up to 99% yield. In addition, further modification of the corresponding chromones afforded novel polycyclic chromones. (C) 2014 Elsevier Ltd. All rights reserved.
A Convenient Synthesis of 2- and 2,3-Substituted 4<i>H</i>-Chromen-4-ones