Rhodium-Catalyzed Conjugated Addition of Aryllead Reagents to α,β-Unsaturated Carbonyl Compounds in Air and Water
作者:Rui Ding、Yong-Jun Chen、Dong Wang、Chao-Jun Li
DOI:10.1055/s-2001-16805
日期:——
In the presence of a rhodium catalyst, α,β-unsaturated esters and ketones (1a-f) react with phenyltrimethyllead 2 in aqueous media and under an air atmosphere to give the corresponding conjugated addition products (3a-e) in high yields.
for two incompatible enantioselective transformations: a rhodium–diene complex-catalyzed asymmetric 1,4-addition occurs in the hydrophilic corona, while a Rh-TsDPEN-catalyzed asymmetric transfer hydrogenation proceeds in the hydrophobic core. Control experiments and kinetic studies showed that the gated behavior induced by the phototriggered reversible spiropyran to merocyanine transition in the cross-linking