Domino day: A highly diastereoselective Cu- or Au-catalyzed tandem cycloisomerization/formal [4+3] cycloaddition of 1-(1-alkynyl) cyclopropyl ketones and nitrones has been developed (see scheme) along with an efficient one-pot, three-component version of this reaction. This methodology provides a route to a new type of 5/7-bicyclic heterocycle: a furan-fused oxazepine.
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Bai et al. (2009) studied this question.
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