Azo anions in systhesis. pt 1. t-butylhydrazones as acyl-anion equivalents
作者:Jack E. Baldwin、Robert M. Adlington、Jeffrey C. Bottaro、Jayant N. Kolhe、Matthew W.D. Perry、Ashok U. Jain
DOI:10.1016/s0040-4020(01)87647-x
日期:1986.1
tautomerisation and hydrolysis gave α-hydroxy ketones, ketones, and γ-keto esters in good yield, thereby providing a convenient new acyl-anionequivalent. Reaction of these lithium salts with aldehydes and ketones, followed by elimination provided a new route to azo alkenes.
Reaction of silyl enol ethers with arenediazonium salts. Part 1. α-Arylation of ketones
作者:Toshiyasu Sakakura、Masayasu Hara、Masato Tanaka
DOI:10.1039/p19940000283
日期:——
α-Arylation of ketones is accomplished by the use of arenediazoniumsalts as aryl-cation equivalents. The reaction of silylenolethers with arenediazonium tetrafluoroborates proceeds in the presence of palladium(0) catalysts and tetraphenylborate anion to give α-aryl ketones in moderate yields. Alternatively, silylenolethers smoothly react with arenediazonium tetrafluoroborates in pyridine even
Synthesis of unsymmetrical ketones by applying visible-light benzophenone/nickel dual catalysis for direct benzylic acylation
作者:Patricia E. Krach、Abhishek Dewanji、Tingting Yuan、Magnus Rueping
DOI:10.1039/d0cc01480j
日期:——
benzylic C–H acylation reaction furnishing a variety of unsymmetrical ketones. A benzophenone-derived photosensitizer combined with a nickel catalyst has been established as the catalytic system. Both acid chlorides and anhydrides are able to acylate the benzylic position of toluene and other methylbenzenes. The method offers a valuable alternative to late transition metal catalyzed C–H acylation reactions
Dehydrogenative Coupling of Benzylic and Aldehydic C–H Bonds
作者:Tairin Kawasaki、Naoki Ishida、Masahiro Murakami
DOI:10.1021/jacs.9b13920
日期:2020.2.19
A photoinduced dehydrogenative coupling reaction between benzylic and aldehydic C-H bonds is reported. When a solution of an alkylbenzene and an aldehyde in ethyl acetate is irradiated with visible light in the presence of iridium and nickel catalysts, a coupled alpha-aryl ketone is formed with evolution of dihydrogen. An analogous C-C bond forming reaction occurs between a C-H bond next to nitrogen