Add time:07/12/2019         Source:sciencedirect.com

Cyclization of 2-(3-oxoalk-1-ynyl)-3-amino-1,4-naphthoquinones under the action of hydrogen bromide followed by Sonogashira cross-coupling of the thus formed 4-bromo substituted azaanthraquinone with terminal acetylenes represent the one-pot synthesis of 4-alk-1-ynyl-1-aza-9,10-anthraquinones.

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