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
BNN-1,3-dipoles: isolation and intramolecular cycloaddition with unactivated arenes
作者:Rui Guo、Jingxing Jiang、Chenyang Hu、Liu Leo Liu、Ping Cui、Meihua Zhao、Zhuofeng Ke、Chen-Ho Tung、Lingbing Kong
DOI:10.1039/d0sc02162h
日期:——
spontaneous intramolecular aminoboration of the proximal arene rings via [3 + 2] cycloaddition (Ar = Dpp or Dmp). The latter reactions showcase the 1,3-dipolar reactivity toward unactivated arenes at ambient temperature. In addition, double cycloaddition of the isolable BNN species with two CO2 molecules affords a bicyclic species consisting of two fused five-membered BN2CO rings. The electronic structures