A mild and efficient protocol for the synthesis of 2,2′-difunctional biaryls from readily available benzamides and oximes by Co(OAc)2·4H2O catalysis has been developed. The catalytic cycle that includes aerobic oxidation of Co(I) to Co(III) is successfully achieved for the first time through dual-chelation-assisted C–H/C–H coupling with the assistance of catalytic Mn(acac)3. The catalytic system exhibits
Three component hydroxyletherification and hydroxylazidation of (trifluoromethyl)alkenes: access to α-trifluoromethyl β-heteroatom substituted tertiary alcohols
The three component hydroxyletherification and hydroxylazidation reactions of (trifluoromethyl)alkenes are reported, providing various useful α-trifluoromethyl β-heteroatom substituted tertiary alcohols in high yields.
O‐Aryloximes, generated from readily available and inexpensive oximes through transition‐metal‐free O‐arylation, can either be hydrolyzed to O‐arylhydroxylamines or conveniently converted to structurally diverse benzo[b]furans through an environmentally benign, one‐pot [3,3]‐sigmatropic rearrangement/cyclization sequence.
通过无过渡金属的O-芳基化反应从廉价和廉价的肟中生成的O-芳基肟可以水解为O-芳基羟胺,也可以通过对环境有益的单锅[3]方便地转化为结构多样的苯并[ b ]呋喃。 ,3]-σ重排/环化序列。
Rhodium‐Catalyzed Oxidative Coupling of Potassium Vinyltrifluoroborate with Arenes: A Direct Access to Functionalized Styrene Derivatives
Herein, we report a Rh(III)-catalyzeddirect alkenylation of arenes with readily available vinyltrifluoroborate to directaccess to functionalized styrenes. This method tolerates a wide range of functional groups in 33 examples with excellent site- and regioselectivity under mild conditions. The synthetic utility was demonstrated through the further transformation of thus-obtained functionalized styrenes