An Efficient and General Method for the Deoxygenation of Organic <i>N</i>-Oxides Using Zn(OTf)<sub>2</sub> and Cu(OTf)<sub>2</sub>
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作者:Jagir Sandhu、Anil Saini、Sanjay Kumar
DOI:10.1055/s-2006-926269
日期:——
A mild and efficient general method for the deoxygenation of organic N-oxides such as azoxybenzenes, N-arylnitrones, and N-heteroarene N-oxides using Zn(OTf)2 and Cu(OTf)2 in excellent yields is described.
Highly Diastereoselective Gold- or Copper-Catalyzed Formal [4+3] Cycloaddition of 1-(1-Alkynyl) Cyclopropyl Ketones and Nitrones
作者:Yu Bai、Jie Fang、Jun Ren、Zhongwen Wang
DOI:10.1002/chem.200901133
日期:2009.9.14
Domino day: A highlydiastereoselective Cu‐ or Au‐catalyzed tandem cycloisomerization/formal [4+3] cycloaddition of 1‐(1‐alkynyl) cyclopropylketones 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.