非对称 2,2"-二取代二茂铁二膦的非对称选择性合成

Yaping Dorcas, Wang
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引用次数: 0

摘要

通过 Negishi 偶联反应,非对映选择性地合成了两组不对称的 2,2"-二取代二茂铁衍生物。(R)-1-(N,N-二甲基氨基)乙基二茂铁与外消旋 2-溴-碘二茂铁的偶联反应产生了两种非对映异构产物。对这些偶联产物的进一步选择性转化使它们转化为相应的 2,2"-二取代二茂铁二膦,成为潜在的不对称配体和催化剂。
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The diastereoselective synthesis of unsymmetrically 2,2"-disubstituted biferrocenesdiphosphine
Two sets of unsymmetrically 2,2"-disubstituted biferrocenes derivatives was diastereoselective synthesized by Negishi coupling reaction. The coupling reaction of (R)-1- (N,N-dimethylamino)ethylferrocene with racemic 2-bromo-iodoferrocene led to two diastereomeric products. Further selective transformations on these coupling products allowed them transformed intocorresponding2,2"-disubstituted biferrocenes diphosphines as potential asymmetric ligands and catalysts.
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