Nickel-catalyzed cross-coupling of methoxyarenes with trimethylaluminum is described. The use of 1,3-dicyclohexylimidazol-2-ylidene as a ligand and NaOtBu as a base promotes the methylation of anis...
The alkylation of phenol derivatives can be achieved in good yield via Lewis or Brønsted acid. The only by-product of the reaction is water and the catalyst can be recycled when using Brønsted acid.
Catalytic Cleavage and Reformation of Ethereal σ-Bonds
作者:Masahito Murai、Kazuki Origuchi、Kazuhiko Takai
DOI:10.1246/cl.180361
日期:2018.7.5
Ether-exchange reaction of alkyl aryl ethers with alcohols and thiols via the cleavage of the C(sp2)–O bond is described. Bi(OTf)3 was found to be a most effective catalyst, and etherification of fused-aromatic ethers proceeded efficiently. Monitoring of reactions revealed conceptually new transetherification between two different ethers, which can be regarded as single-bond metathesis under the same
Sulfonated bis(naphthoxy)alkanes as dental plaque barriers
申请人:Johnson & Johnson Products Inc.
公开号:US04307077A1
公开(公告)日:1981-12-22
Compounds useful in compositions and methods for preventing the attachment of dental plaque to the surfaces of the teeth of mammals comprise certain sulfonated bis(naphthoxy)alkanes and the pharmaceutically acceptable salts thereof. They are used in pharmaceutically acceptable vehicles that are periodically applied to teeth.
Bismuth(III)-Catalyzed Dehydrative Etherification and Thioetherification of Phenolic Hydroxy Groups
作者:Masahito Murai、Kazuki Origuchi、Kazuhiko Takai
DOI:10.1021/ol501744g
日期:2014.7.18
Use of a bismuth catalyst allowed efficient dehydrative substitution of phenolic hydroxy groups with alcohols and thiols to form C-O and C-S bonds. The reaction required equimolar amounts of two readily available substrates that generated H2O as the only byproduct. The relatively mild reaction conditions were compatible with the functional groups selected, and provided excellent chemoselectivity.