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<p>We describe herein the facile preparation and characterization of new photobase generators based on carboxylate-functionalized chromophores. They pair high wavelength absorption with the liberation of an extremely strong phosphazene superbase. We additionally demonstrate their outstanding capacity in initiating a Brønsted base mediated oxa-Michael addition through a systematic optimization study. To the best of our knowledge, this work marks the first report on the light triggered initiation of an oxa-Michael addition reaction between an alcohol and acrylamide via photobase generators.</p> Graphical abstract <p></p>

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Photoinduced liberation of a phosphazene superbase as an initiator for oxa-Michael addition reactions

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年9月23日

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  • Edma Gjata,
  • Klaus Ableidinger,
  • Robert Liska,
  • Patrick Knaack

摘要

We describe herein the facile preparation and characterization of new photobase generators based on carboxylate-functionalized chromophores. They pair high wavelength absorption with the liberation of an extremely strong phosphazene superbase. We additionally demonstrate their outstanding capacity in initiating a Brønsted base mediated oxa-Michael addition through a systematic optimization study. To the best of our knowledge, this work marks the first report on the light triggered initiation of an oxa-Michael addition reaction between an alcohol and acrylamide via photobase generators.

Graphical abstract