Water-compatible one-pot organocatalytic asymmetric synthesis of cyclic nitrones. Application in intramolecular 1,3-dipolar cycloadditions
作者:David Sádaba、Ignacio Delso、Tomás Tejero、Pedro Merino
DOI:10.1016/j.tetlet.2011.08.138
日期:2011.11
active five-membered cyclic nitrones are readily obtained in a one-pot procedure via the organocatalytic Michael addition of aldehydes to nitroolefins and in situ reductive cyclization. Application of the methodology to the synthesis of tricyclic compounds through intramolecular 1,3-dipolar cycloaddition reactions (DFT calculations have also been performed) is also demonstrated. All the reactions were
通过一锅法通过将醛有机催化迈克尔加成到硝基烯烃和原位还原环化反应,很容易在一锅法中获得旋光五元环硝酮。还证明了该方法在通过分子内1,3-偶极环加成反应合成三环化合物中的应用(也已进行了DFT计算)。所有反应均在水中作为溶剂进行,并获得优异的ee值(ee> 99%)。