Synthesis of
<scp>4</scp>
<i>H</i>
‐chromene‐isoxazole hybrids via
<i>ortho</i>
‐hydroxy directing cyclization of isoxazole‐styrenes and Michael addition of imino‐chromenes in aqueous medium
作者:Sakkani Nagaraju、Kota Sathish、Dhurke Kashinath
DOI:10.1002/jhet.4251
日期:2021.6
AbstractA green, efficient, and one‐pot method synthesis of functionalized 4H‐chromene‐isoxazole hybrids is reported via o‐hydroxy group directing cyclization of isoxazole‐styrenes and Michael addition of 3,5‐dimethyl‐4‐nitroisoxazole on 2‐imino‐2H‐chromene‐3‐carbonitrile (independent methods). The developed methodology was further extended for nitromethane, malononitrile, and alkylcyanoacetates as Michael donors.