Allyl Palladium Complexes of Cycloheptatrienyl-Cyclopentadienyl Phosphane Ligands in Buchwald-Hartwig Amination Reactions

被引：4

作者：

Troendle, Sabrina ^{[1
]}

Freytag, Matthias ^{[1
]}

Jones, Peter G. ^{[1
]}

Tamm, Matthias ^{[1
]}

机构：

[1] Tech Univ Carolo Wilhelmina Braunschweig, Inst Anorgan & Analyt Chem, Hagenring 30, D-38106 Braunschweig, Germany

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2019年 / 2019卷 / 21期

关键词：

C-N coupling; Palladium; Sandwich complexes; Phosphane ligands; Titanium; CROSS-COUPLING REACTIONS; HETEROCYCLIC CARBENE COMPLEXES; PD-CATALYZED AMINATION; SUZUKI-MIYAURA; C-N; OXIDATIVE ADDITION; (NHC)PD(ALLYL)CL NHC; HIGHLY EFFICIENT; ACTIVE CATALYST; BOND FORMATION;

D O I：

10.1002/ejic.201900225

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A series of well-defined palladium allyl chloride precatalysts was synthesized using previously reported troticenyl phosphane ligands [(eta(7)-C7H7)Ti(eta(5)-C5H4PR2)] and [(eta(7)-C7H6PR2) Ti(eta(5)-C5H5)] (R = Cy, tBu) as ancillary ligands. The formation of a dimeric mu-chloro-, mu-allyl-bridged Pd-I species was observed with the ligand [(eta(7)-C7H7) Ti(eta(5)-C5H4PtBu2)], whereas L2Pd0 {L = [(eta(7)-C7H6PtBu2)Ti(eta(5)-C5H5)]} was formed in presence of KOtPent. In addition, the catalytic activity of the palladium allyl chloride pre-catalysts was investigated in Buchwald-Hartwig amination reactions with various aryl halogenides and N-methylaniline or morpholine. The cyclohexyl derivatives show almost no catalytic activity, whereas for the tert-butyl derivatives a significant difference could be observed, depending on whether the seven-membered ring or the five-membered ring is functionalized.

引用

页码：2569 / 2576

页数：8

共 81 条

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