Ketone Formation via Mild Nickel-Catalyzed Reductive Coupling of Alkyl Halides with Aryl Acid Chlorides
作者:Fan Wu、Wenbin Lu、Qun Qian、Qinghua Ren、Hegui Gong
DOI:10.1021/ol3011198
日期:2012.6.15
The present work highlights unprecedented Ni-catalyzed reductive coupling of unactivated alkyl iodides with aryl acid chlorides to efficiently generate alkyl arylketones under mild conditions.
Abstract Alkyl aryl ketones were prepared on a gram scale by the nickel-catalyzed reductive coupling of alkyl iodides with aroyl chlorides. When scaled up 30-fold, this reaction shows a comparable coupling efficiency to the previously reported reaction performed under small-scale conditions. The mild and convenient reaction conditions show excellent tolerance to a range of functional groups and provide
A direct transformation of secondary amides into α‐branched ketones with enamines as soft alkylation reagents was developed. In this reaction, enamines serve as surrogates of alkyl carbanions, rather than the conventional enolates equivalents in the Stork's reactions, which allowed for the easy introduction of alkyl groups with electrophilic functional groups. In the presence of 4 Å molecular sieves
Mild ketone formation via Ni-catalyzed reductive coupling of unactivated alkyl halides with acid anhydrides
作者:Hongyu Yin、Chenglong Zhao、Hengzhi You、Kunhua Lin、Hegui Gong
DOI:10.1039/c2cc33232a
日期:——
Ni-catalyzed ketone formation through mild reductive coupling of a diverse set of unactivated alkyl bromides and iodides with particularly aryl acidanhydrides was successfully developed using zinc as the terminal reductant. These conditions also allow direct coupling of alkyl iodides with aryl acids in the presence of Boc(2)O and MgCl(2).
Photochemical reaction of 2-acyloxy-1-methoxycarbonylcyclohexenes: an efficient aliphatic photo-Fries rearrangement and a novel 1,5-aroyl migration
作者:Hideharu Seto、Hajime Kosemura、Yasuo Fujimoto
DOI:10.1039/c39920000908
日期:——
xenes readily undergo photo-Fries rearrangement to give 2-acyl-2-methoxycarbonylcyclohexanones in good yields and among them 2-aroyloxy-1-methoxycarbonylcyclohexenes also undergo a novel 1,5-aroyl migration according to irradiation conditions to give 4-aroyl-2-methoxycarbonylcyclohexanones, which result from 1,3-aroyl migration following photo-Fries rearrangement.