标题:Synthesis and Reactivity of N-Heterocyclic PSiP Pincer Iron and Cobalt Complexes and Catalytic Application of Cobalt Hydride in Kumada Coupling Reactions
作者:Xiong, Zichang; Li, Xiaoyan; Zhang, Shumiao; Shi, Yaomin; Sun, Hongjian
作者机构:[Xiong, Zichang; Li, Xiaoyan; Zhang, Shumiao; Shi, Yaomin; Sun, Hongjian] Shandong Univ, Sch Chem & Chem Engn, Key Lab Special Funct Aggregated Mat, M 更多
通讯作者:Sun, Hongjian
通讯作者地址:[Sun, HJ]Shandong Univ, Sch Chem & Chem Engn, Key Lab Special Funct Aggregated Mat, Minist Educ, Shanda Nanlu 27, Jinan 250199, Peoples R China.
来源:ORGANOMETALLICS
出版年:2016
卷:35
期:3
页码:357-363
DOI:10.1021/acs.organomet.5b00937
摘要:The new N-heterocyclic sigma-silyl pincer ligand HSiMe-(NCH2PPh2)(2)C6H4 (1) was designed. A series of tridentate silyl pincer Fe and Co complexes were prepared. Most of them were formed by chelate-assisted Si-H activation. The typical iron hydrido complex FeH(PMe3)(2)(SiMe(NCH2PPh2)(2)C6H4) (2) was obtained by Si-H activation of compound 1 with Fe(PMe3)(4). The combination of compound 1 with CoMe(PMe3)(4) afforded the Co(I) complex Co(PMe3)(2)(SiMe(NCH2PPh2)(2)C6H4) (3). The Co(III) complex CoHCl(PMe3)(SiMe(NCH2PPh2)(2)C6H4) (5) was generated by the reaction of complex 1 with CoCl(PMe3)(3) or the combination of complex 3 with HCl. However, when complex 3 was treated with MeI, the Co(II) complex CoI(PMe3)(SiMe(NCH2PPh2)(2)C6H4) (4), rather than the Co(III) complex, was isolated. The catalytic performance of complex 5 for Kumada coupling reactions was explored. With a catalyst loading of 5 mol %, complex 5 displayed efficient catalytic activity for Kumada cross-coupling reactions of aryl chlorides and aryl bromides with Grignard reagents. This catalytic reaction mechanism is proposed and partially experimentally verified.
收录类别:EI;SCOPUS;SCIE
WOS核心被引频次:9
Scopus被引频次:10
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-84957863806&doi=10.1021%2facs.organomet.5b00937&partnerID=40&md5=a6121b23c1d89ef58ccff92a17085bae
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