A Mild Ni/Cu-Catalyzed Silylation via C–O Cleavage
摘要:
A Ni/Cu-catalyzed silylation of unactivated C-O electrophiles derived from phenols or benzyl alcohols is described. This transformation is characterized by its wide scope and mild conditions, providing a direct access to synthetically versatile silylated compounds. The protocol allows for the coupling of C(sp(2))-O and even C(sp(3))-O bonds with similar efficiency.
[EN] ORGANIC COMPOUND AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING SAME [FR] COMPOSÉ ORGANIQUE ET DISPOSITIF ÉLECTROLUMINESCENT ORGANIQUE LE COMPRENANT [KO] 유기 화합물 및 이를 포함한 유기전계발광소자
catalysis via the selective formation of vinyl and aryl boronate esters. The competing hydrided reduction or allylic borylation proceeds sluggishly or does not occur, therefore providing a selective strategy for the incorporation of boronate into olefins and arenes. Mechanistic studies indicate that the σ-bondmetathesis or oxidative addition mechanism may be considered to be responsible for the cleavage
Novel axially chiral ligands have been designed and synthesized by merging the chelating picolinic acid with substituted BINOLs. The in-situ-prepared copper catalysts from the ligands and CuI enable the asymmetric oxidativecoupling of 2-naphthols, affording 6,6′-disubstituted BINOLs in up to 89% yield with good enantioselectivities (up to 96:4 e.r.).