carbonyl compounds. Herein we demonstrate for the first time that tropylium salts can act as organic Lewis acid catalysts to facilitate acetalization and transacetalization reactions of a wide range of aldehyde substrates. This metal-free method works efficiently in both batch and flow conditions, prompting further future applications of tropylium organocatalysts in green synthesis.
羰基化反应在羰基化合物重要的掩蔽
化学中起着重要的作用。在本文中,我们首次证明了对
钾盐可以用作有机
路易斯酸催化剂,以促进各种醛底物的
缩醛化和反
缩醛化反应。这种无
金属方法在间歇和流动条件下均能有效工作,从而促进了对硝基有机催化剂在绿色合成中的进一步应用。