Isolation and Reduction of Sterically Encumbered Arylboron Dihalides: Novel Boranediyl Insertion into C−C σ-Bonds
作者:Warren J. Grigsby、Philip P. Power
DOI:10.1021/ja960918j
日期:1996.1.1
Scheme 1) in which the boranediyl intermediate has inserted into an o-Me-ring C−C σ-bond to form a borafluorenyl structure incorporating boron in a delocalized five-membered ring. Boranediyl insertion into C−C σ-bonds, as distinct from boranediyl induced rearrangements involving CC cleavage in delocalized aromatic substrates, is unknown. The main difference between the structures of these products is that
Reductive Borylene-CO Coupling with a Bulky Arylborylene Complex
作者:Holger Braunschweig、Rian D. Dewhurst、Christian Hörl、Krzysztof Radacki、Christopher W. Tate、Alfredo Vargas、Qing Ye
DOI:10.1002/anie.201303798
日期:2013.9.16
Partial metal–boron bond cleavage and coupling of a borylene with two CO ligands was observed upon reduction of a new bulkyarylborylenecomplex. Both the borylene precursor and dianionic product were structurally and spectroscopically characterized. In contrast, reduction of an aminoborylene complex led to complete loss of the borylene ligand and classical Hieber reduction. A rationale for these differences