C–H functionalisation of aldehydes using light generated, non-stabilised diazo compounds in flow
作者:Paul Dingwall、Andreas Greb、Lorène N. S. Crespin、Ricardo Labes、Biagia Musio、Jian-Siang Poh、Patrick Pasau、David C. Blakemore、Steven V. Ley
DOI:10.1039/c8cc06202a
日期:——
Here we explore further the use of oxadiazolines, non-stabilised diazo precursors which are bench stable, in direct, non-catalytic, aldehyde C–H functionalisation reactions under UV photolysis in flow and free from additives.
One-Pot Transformation of Aldehydes to Ketones via Minisci-Type Reaction of Imines
作者:Zakhar M. Rubanov、Vitalij V. Levin、Alexander D. Dilman
DOI:10.1021/acs.orglett.3c03764
日期:2023.12.8
A method for the conversion of aldehydes to ketones via the preliminary formation of aldiminines is described. The imines are involved in acid promoted Minisci-type reaction with alkyl radicals generated fromesters of N-hydroxylphthalimide under photoredox conditions. Aminyl radical cations formed after the addition of the iminium ions are believed to be key intermediates, which determine the reaction
ELLIOTT M.; FARNHAM A. W.; JANES N. F.; JOHNSON D. M.; PULMAN D. A., PESTIC. SCI., 1980, 11, NO 5, 513-525
作者:ELLIOTT M.、 FARNHAM A. W.、 JANES N. F.、 JOHNSON D. M.、 PULMAN D. A.
DOI:——
日期:——
Cobalt-Catalyzed Markovnikov-Selective Radical Hydroacylation of Unactivated Alkenes with Acylphosphonates
作者:Benxiang Zhang、Jiayan He、Yi Li、Tao Song、Yewen Fang、Chaozhong Li
DOI:10.1021/jacs.1c02629
日期:2021.4.7
Acylphosphonates having the 5,5-dimethyl-1,3,2-dioxophosphinanyl skeleton are developed as efficient intermolecular radical acylation reagents, which enable the cobalt-catalyzed Markovnikov hydroacylation of unactivatedalkenes at room temperature under mild conditions. The protocol exhibits broad substrate scope and wide functional group compatibility, providing branched ketones in satisfactory yields
Formal <i>γ</i>−C−H Functionalization of Cyclobutyl Ketones: Synthesis of <i>cis</i>‐1,3‐Difunctionalized Cyclobutanes
作者:Zhoulong Fan、Daniel A. Strassfeld、Han Seul Park、Kevin Wu、Jin‐Quan Yu
DOI:10.1002/anie.202303948
日期:2023.6.19
A sequential C−H/C−C functionalization strategy was reported to effect the otherwise challenging synthesis of 1,3-disubstituted cyclobutane building blocks. Numerous aryl, heteroaryl, alkenyl, and alkynyl groups can be installed at the 3-position of the cyclobutanering with exclusive cis-selectivity.