Copper(<scp>i</scp>)-catalysed stereoselective debromoborylation of aliphatic 1,1-dibromo-1-alkenes with bis(pinacolato)diboron
作者:Yadong Pang、Ryoto Kojima、Hajime Ito
DOI:10.1039/c8ob01778f
日期:——
A stereoselective debromoborylation of aliphatic 1,1-dibromo-1-alkenes to prepare (Z)-1-bromo-1-alkenylboronate esters using copper(I) catalysts was developed. The debromoborylation of various aliphatic 1,1-dibromo-1-alkenes in the presence of a copper(I) catalyst and bis(pinacolato)diboron proceeded smoothly to produce (Z)-1-bromo-1-alkenylboronate esters in good yields with only Z geometry.
C−H Activation of Unbiased C(sp<sup>3</sup>)−H Bonds: Gold(I)‐Catalyzed Cycloisomerization of 1‐Bromoalkynes**
作者:Rubén Miguélez、Nina Semleit、Carlos Rodríguez‐Arias、Pavel Mykhailiuk、José M. González、Gebhard Haberhauer、Pablo Barrio
DOI:10.1002/anie.202305296
日期:2023.6.26
A gold-catalyzed intramolecular insertion reaction of strictly unactivated C(sp3)−H bonds is described. The reaction uses readily available starting materials and benefits from extremely simple reaction conditions. A library of structurally diverse scaffolds bearing a C(sp2)−Br bond has been obtained. In addition, an original reaction pathway in gold catalysis involving a concerted insertion on a gold-stabilized