α-Cationic Phospholes: Synthesis and Applications as Ancillary Ligands

被引：15
作者：
Johannsen, Tim [1 ]
Golz, Christopher [1 ]
Alcarazo, Manuel [1 ]
机构：
[1] Georg August Univ Gottingen, Inst Organ & Biomol Chem, Tammanstr 2, Gottingen, Germany
来源：
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2020年 / 59卷 / 50期
基金：
欧洲研究理事会;
关键词：
Au catalysis; cationic ligands; hydroarylation; ligand design; phospholes; COORDINATION CHEMISTRY; PHOSPHINES SYNTHESIS; X-RAY; COMPLEXES; REACTIVITY; CATALYSTS;
D O I：
10.1002/anie.202009303
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A series of structurally differentiated alpha-cationic phospholes containing cyclopropenium, imidazolium, and iminium substituents has been synthesized by reaction of chlorophosphole1with the corresponding stable carbenes. Evaluation of the donor properties of these compounds reveals that their strong pi-acceptor character is heavily influenced by the nature of the cationic group. The coordination chemistry of these newly prepared ligands towards Au(I)centers is also described and their unique electronic properties exploited in catalysis. Interestingly, alpha-cationic phosphole containing catalysts were not only able to accelerate model cycloisomerization reactions, but also to efficiently discriminate between concurrent reaction pathways, avoiding the formation of undesired product mixtures.
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页码：22779 / 22784
页数：6
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