Phosphorus dendrimers containing terminal phosphoramidite ligands have been found to be highly effective and recoverable catalysts for the rhodium(I) catalyzed [2+2+2] cycloaddition reactions. A strong positive dendritic effect is observed both in the activity and enantiodiscrimination leading to axially chiral biaryl compounds.
在
铑(I)催化的[2+2+2]环加成反应中,发现含有末端
磷酰胺
配体的
磷树枝状化合物是一种高效且可回收的催化剂。在生成轴向手性双芳基化合物的活性和对映分辨方面,都观察到了强烈的正树枝状效应。