Unprecedented B-H Activation Through Pd-Catalysed B-Cvinyl Bond Coupling on Borane Systems

被引:24
|
作者
Farras, Pau [1 ]
Olid-Britos, David [1 ]
Vinas, Clara [1 ]
Teixidor, Francesc [1 ]
机构
[1] Inst Ciencia Mat Barcelona ICMAB CSIC, Bellaterra 08193, Spain
关键词
Cobalt; Palladium; Heck reaction; Cross-coupling; B-C coupling; CARBORANE DERIVATIVES; SUBSTITUTION-REACTIONS; PALLADIUM; IODINATION; BORON; CHEMISTRY; ARYLATION; CRYSTAL; ALKYNES; COBALT;
D O I
10.1002/ejic.201100177
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
A Pd-induced cascade B-C-vinyl coupling that produces multiple B-C-vinyl bonds starting from a single B-I bond has been demonstrated. The process is most probably stimulated by the geometrical disposition of the B-H bonds confronting the B-Pd sites, along with the hydride character of the B-H units. Two and one B-C-vinyl couplings on the metallacarborane substrate have been generally obtained, but formation up to six B-C-vinyl bonds has been observed. A theoretical reaction mechanism involving an unprecedented B-H activation is proposed to interpret the multisubstitution process.
引用
收藏
页码:2525 / 2532
页数:8
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