15-Membered Triolefinic Macrocycles − Catalytic Role of (E,E,E)-1,6,11-Tris(arenesulfonyl)-1,6,11-triazacyclopentadeca-3,8,13-triene Complexes of Palladium(0) in the Presence of Phosphanes
作者:Marcial Moreno-Mañas、Roser Pleixats、Jan Spengler、Carole Chevrin、Boris Estrine、Sandrine Bouquillon、Françoise Hénin、Jacques Muzart、Anna Pla-Quintana、Anna Roglans
DOI:10.1002/ejoc.200390029
日期:2003.1
The palladium(0) complexes of (E,E,E)-1,6,11-tris(arenesulfonyl)-1,6,11-triazacyclopentadeca-3,8,13-trienes deliver palladium to phosphanes with the generation of high concentrations of catalytically active species such as Pd(PPh3)2. After oxidation of the phosphanes, the palladium is reincorporated into the macrocycle, thus avoiding agglomeration and precipitation. These conclusions were reached by
(E,E,E)-1,6,11-tris(arenesulfonyl)-1,6,11-triazacyclopentadeca-3,8,13-trienes 的钯 (0) 络合物将钯传递给磷烷,生成高Pd(PPh3)2 等催化活性物质的浓度。磷烷氧化后,钯重新结合到大环中,从而避免团聚和沉淀。这些结论是通过 31P NMR、19F NMR 和调聚和 Tsuji-Trost 反应的电喷雾电离质谱研究得出的。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)