Photoexcited arylketones catalyze the direct chlorination of C(sp3)–H groups by N- chlorosuccinimide. Acetophenone is the most effective catalyst for functionalization of unactivated C–H groups while benzophenone provides better yields for benzylic C–H functionalization. Activation of both acetophenone and benzophenone can be achieved by irradiation with a household compact fluorescent lamp. This light-dependent
Etudes cinetiques des reactions de solvolyse de chlorures d'α-phenylethyle substitues
作者:C. Mechelynck-David、P.J.C. Fierens
DOI:10.1016/0040-4020(59)80005-3
日期:1959.1
study of the solvolysis of m-CH3, p-CH3, m-OCH3, p-Cl, m-Cl and p-F substituted α-phenylethyl chlorides has been carried out in the following media: water 20·5%-dioxane 79·5% water 49·3%-dioxane 50·7% water 66·66%-dioxane 33·33% water 5·3%-dioxane 25·8%-formic acid 69·7% water 6·1%-dioxane 39·8%-formic acid 54·1% water 5·8%-dioxane 60·2%-formic acid 34·0% Correlation of solvolysisrates has been made
cobalt-catalyzed enantioconvergent radical Negishi C(sp3)–C(sp2) cross-coupling of racemic benzyl chlorides with arylzinc reagents has been developed in good yield with moderate enantioselectivities. This strategy provides an expedient access toward a range of enantioenriched 1,1-diarylmethanes. Key to this discovery is the utilization of a chiral multidentate anionic N,N,P-ligand to strongly coordinate with the
Decarbonylative Transfer Hydrochlorination of Alkenes and Alkynes Based on a B(C
<sub>6</sub>
F
<sub>5</sub>
)
<sub>3</sub>
‐Initiated Grob Fragmentation
作者:Kaixue Xie、Martin Oestreich
DOI:10.1002/anie.202203692
日期:2022.6.13
fragmentation of cyclohexa-2,5-dien-1-yl-substituted acyl chlorides into a low-molecular-weight arene, carbon monoxide and HCl. In the presence of π-basic substrates such as alkenes and alkynes, HCl is transferred stepwise to afford the corresponding hydrochlorination products. The overall reaction is a decarbonylative transfer hydrochlorination driven by aromatization and carbon-monoxide release.
A method of producing an aromatic ketone and an aromatic ketone composition containing it
申请人:TORAY INDUSTRIES, INC.
公开号:EP1053990A2
公开(公告)日:2000-11-22
In a method of producing an aromatic ketone an aromatic compound having an R-CH2 group ( R denotes an alkyl group, aryl group, allyl group or aralkyl group) is oxidised in liquid phase by an oxygen-containing gas in the presence of a catalyst comprising a heavy metal compound and at least one compound selected from (1) ammonia, (2) organic basic compounds and (3) onium halides while the water produced in the reaction is removed from the reaction solution.
An aromatic ketone composition produced by the process comprises the aromatic ketone and 10 ppm to 3 wt% of at least one compound selected from: a benzene derivative of the formula (II)
a vinylbenzene of the formula (III)
a benzaldehyde of the formula (IV)
where X is a substituent; n is zero or 1 to 5; R is alkyl, aryl, allyl or aralkyl and R1 is hydrogen, alkyl, aryl, allyl or aralkyl.