Michael addition of α-azido ketones on iminocoumarin derivatives: an efficient access to new functionalized azido chromenes

A facile one-pot synthesis of functionalized azido chromenes was achieved by Michael addition of α-azido ketones on iminocoumarin derivatives obtained from salicylaldehydes and malononitrile. Synthesized azido chromenes were successfully transformed into triazolyl chromenes by the [3+2] cycloaddition reaction.