Cross-coupling of alcohols to value-added products by using sustainable catalytic reactions has gained attention in recent years. Isomerization of secondary allylic alcohol to the corresponding enolizable ketone is an atom economical and known transformation. Herein, a selective cross-coupling of secondary allylic alcohol and primary alcohol is reported to afford the corresponding α-alkenyl or alkylation
Palladium nanoparticles immobilized on an amino‐functionalized syndiotactic polystyrene (sPS‐N) served as a novel recyclable catalyst for the dimethylation and cross methyl alkylation of a wide range of ketones with methanol as the methylation agent. This heterogeneous catalyst (Pd@sPS‐N) was highly robust and showed excellent thermal stability and chemical resistance. It not only showed remarkably high
固定在氨基官能化间同立构聚苯乙烯(s PS-N)上的钯纳米粒子是新型可循环利用的催化剂,用于以甲醇为甲基化剂的多种酮的二甲基化和交叉甲基烷基化。这种非均相催化剂(Pd @ s PS-N)非常坚固,并显示出出色的热稳定性和耐化学性。它不仅显示出非常高的活性,而且还可以通过过滤容易地回收而又不损失活性。
Iron-Catalyzed Tandem Three-Component Alkylation: Access to α-Methylated Substituted Ketones
The borrowing hydrogen strategy has been applied in the synthesis of α-branched methylated ketones via a tandem three-component reaction catalyzed by a diaminocyclopentadienone iron tricarbonyl complex. Various alkyl and aromatic methyl ketones underwent dialkylation with various primary alcohols and methanol as alkylating agents in mild reaction conditions and good yields. Deuterium labeling experiments
A Convenient Ruthenium-Catalysed α-Methylation of Carbonyl Compounds using Methanol
作者:Tuan Thanh Dang、Abdul Majeed Seayad
DOI:10.1002/adsc.201600562
日期:2016.11.3
effective for the one‐pot sequential α‐alkylation–α‐methylation of methyl ketones and conjugate reduction–α‐methylation of α,β‐unsaturated ketones to synthesise α‐branched ketones. An application of the α‐methylation of esters using the ruthenium catalyst was demonstrated for an alternative catalytic synthesis of Ketoprofen.
Iridium-catalyzed selective α-methylation of ketones with methanol
作者:Shinji Ogawa、Yasushi Obora
DOI:10.1039/c3cc49626k
日期:——
Iridium-catalyzed selective α-dimethylation and α-methylation of ketones or phenylacetonitriles, using methanol as the methylating agent, were achieved.