Transition-Metal-Free Synthesis of <i>N</i>
-Hydroxy Oxindoles by an Aza-Nazarov-Type Reaction Involving Azaoxyallyl Cations
作者:Wenzhi Ji、Yahu A. Liu、Xuebin Liao
DOI:10.1002/anie.201607177
日期:2016.10.10
transition‐metal‐free method to construct N‐hydroxy oxindoles by an aza‐Nazarov‐type reactioninvolvingazaoxyallylcation intermediates is described. A variety of functional groups were tolerated under the weak basic reaction conditions and at room temperature. A one‐pot process was also developed to make the reaction even more practical. This method provides alternative access to oxindoles and their biologically active
Highly selective and controllable synthesis of arylhydroxylamines by the reduction of nitroarenes with an electron-withdrawing group using a new nitroreductase BaNTR1
A new bacterial nitroreductase has been identified and used as a biocatalyst for the controllable reduction of a variety of nitroarenes with an electron-withdrawinggroup to the corresponding N-arylhydroxylamines under mild reaction conditions with excellent selectivity (>99%). This method therefore represents a green and efficient method for the synthesis of arylhydroxylamines.