Thianthrenation-Enabled α-Arylation of Carbonyl Compounds with Arenes
作者:Xiao-Xue Nie、Yu-Hao Huang、Peng Wang
DOI:10.1021/acs.orglett.0c02913
日期:2020.10.2
The Pd-catalyzed α-arylation of carbonylcompounds with simple arenes enabled by site-selective thianthrenation has been demonstrated. This one-pot process using thianthrenium salts as the traceless arylating reagents features mild conditions and a broad substrate scope. In addition, this protocol could also tolerate the heterocyclic carbonylcompounds and complex bioactive molecules, which is appealing
A chemoselective C−O bond cleavage of the ester alkyl side‐chain of α‐acyloxy ketones was realized for the first time by a highly efficient palladium‐catalyzed hydrogenolysis (S/C=6000, the highest catalytic efficiency by far). Furthermore, a kinetic resolution of α‐acyloxy ketones was first developed by enantioselective hydrogenolysis with good yields and up to 99 % ee.
通过高效钯催化的氢解反应(S / C = 6000,迄今为止最高的催化效率),首次实现了α-酰氧基酮的酯烷基侧链的化学选择性C-O键断裂。此外,首先通过对映选择性氢解反应开发了α-酰氧基酮的动力学拆分方法,该方法具有良好的收率和高达99%ee的收率。
[DE] VERFAHREN ZUR HERSTELLUNG VON 2,5-DIMETHYLPHENYLESSIGSÄURE<br/>[EN] METHOD FOR PRODUCING 2,5-DIMETHYLPHENYL ACETIC ACID<br/>[FR] PROCEDE POUR PRODUIRE DE L'ACIDE 2,5-DIMETHYLPHENYLACETIQUE
申请人:BAYER CROPSCIENCE AG
公开号:WO2005075401A1
公开(公告)日:2005-08-18
Die Erfindung betrifft ein Verfahren zur Herstellung von 2,5-Dimethylphenylessigsäure durch Umsetzung von p-Xylol mit Chloracetylchlorid zu 2-Chlor-1-(2,5-dimethylphenyl)-ethanon, welches mit der Verbindung der Formel (II) zu der Verbindung der Formel (III) reagiert, die dann zu einem Gemisch der Verbindungen (IV) und (V) umgelagert wird, welches dann zu 2,5-Dimethylphenylessigsäure verseift wird. (II) (III) (IV) (V).
该发明涉及一种通过将对二甲苯与氯乙酰氯反应制备2,5-二甲基苯乙酸的方法,反应生成2-氯-1-(2,5-二甲基苯基)-乙酮,然后与式(II)的化合物反应生成式(III)的化合物,然后重排成化合物(IV)和(V)的混合物,最后将其皂化制备成2,5-二甲基苯乙酸。 (II) (III) (IV) (V)。
Method for Producing 2,5-Dimethylphenyl Acetic Acid
申请人:Himmler Thomas
公开号:US20080234501A1
公开(公告)日:2008-09-25
The invention relates to a method for preparing 2,5-dimethylphenylacetic acid by converting p-xylene with chloroacetyl chloride into 2-chloro-1-(2,5-dimethylphenyl)ethanone, which is reacted with the compound of the formula (II) to give the compound of the formula (III), which is then rearranged to give a mixture of the compounds (IV) and (V), which is then hydrolyzed to 2,5-dimethylphenylacetic acid.
Method for producing 2,5-dimethylphenyl acetic acid
申请人:HIMMLER Thomas
公开号:US20090156839A1
公开(公告)日:2009-06-18
The invention relates to a method for preparing 2,5-dimethylphenylacetic acid by converting p-xylene with chloroacetyl chloride into 2-chloro-1-(2,5-dimethylphenyl)ethanone, which is reacted with the compound of the formula (II) to give the compound of the formula (III), which is then rearranged to give a mixture of the compounds (IV) and (V), which is then hydrolyzed to 2,5-dimethylphenylacetic acid.