Selective Catalytic Synthesis of α-Alkylated Ketones and β-Disubstituted Ketones via Acceptorless Dehydrogenative Cross-Coupling of Alcohols
作者:Dipanjan Bhattacharyya、Bikash Kumar Sarmah、Sekhar Nandi、Hemant Kumar Srivastava、Animesh Das
DOI:10.1021/acs.orglett.0c04098
日期:2021.2.5
phosphine-free pincer ruthenium(III) catalyzed β-alkylation of secondaryalcohols with primary alcohols to α-alkylated ketones and two different secondaryalcohols to β-branched ketones are reported. Notably, this transformation is environmentally benign and atom efficient with H2O and H2 gas as the only byproducts. The protocol is extended to gram-scale reaction and for functionalization of complex vitamin E
Nickel-Catalyzed Alkylation of Ketone Enolates: Synthesis of Monoselective Linear Ketones
作者:Jagadish Das、Mari Vellakkaran、Debasis Banerjee
DOI:10.1021/acs.joc.8b02609
日期:2019.1.18
Herein we have developed a Ni-catalyzed protocol for the synthesis of linear ketones. Aryl, alkyl, and heteroaryl ketones as well as alcohols yielded the monoselective ketones in up to 90% yield. The catalytic protocol was successfully applied in to a gram-scale synthesis. For a practical utility, applications of a steroid derivative, oleyl alcohol, and naproxen alcohol were employed. Preliminary catalytic
An iron‐catalyzed chemo‐ and diastereoselective reduction of α,β‐unsaturated ketones into the corresponding saturated ketones in mild reaction conditions is reported herein. DFT calculations and experimental work underline that transfer hydride reduction is a more facile process than hydrogenation, unveiling the fundamental role of the base.
Nickel‐catalyzed α‐alkylation of ketones with benzyl alcohols
作者:Di Wu、Yubin Wang、Min Li、Lei Shi、Jichang Liu、Ning Liu
DOI:10.1002/aoc.6493
日期:2022.2
We reported an efficient method for α-alkylation of ketones with benzyl alcohols using the pyridine-bridged pincer-type N-heterocyclic carbenes nickel complexes as catalysts. A wide range of ketones and benzyl alcohols were efficiently converted into various alkylated products in moderate to high yields. In addition, these nickel complexes were also successfully applied for the synthesis of a wide
REACTION OF (<i>E</i>)-PHENYL 2-PYRIDYL KETONE<i>O</i>-ACYLOXIMES (PPAO) WITH GRIGNARD REAGENTS. A CONVENIENT AND HIGHLY CHEMOSELECTIVE SYNTHESIS OF KETONES
The reaction of (E)-phenyl 2-pyridyl ketone O-acyloximes (PPAO) with Grignardreagents was found to be widely applicable to the chemoselective synthesis of various ketones in good yields under mild conditions.