Electrochemical oxidation of catechols (1a—c) has been studied in the presence of 2-hydroxy-1,4-naphtoquinone (3b) in aqueous solutions, using cyclic voltammetry and controlled-potential coulometry. The results indicated that the electrochemically generated o-benzoquinones (2a—c) participate in Michael addition reaction with 3b to the corresponding benzofuranoquinones (8a—c, 10a—c). The electrochemical synthesis of these compounds has been successfully preformed at a carbon rod electrode with good yields using an environmentally friendly method.
Disclosed is a process for preparing a diaryl oxalate which comprises the step of transesterifying a dialkyl oxalate or/and an alkylaryl oxalate with an aryl alcohol in the presence of a tetra(aryloxy)titanium as a catalyst, wherein the tetra(aryloxy)titanium is fed into a reaction system of the transesterification as an aryl alcohol solution of the tetra(aryloxy)titanium which is prepared by reacting a tetraalkoxy titanium and an excess amount of the aryl alcohol and removing a by-producing alkyl alcohol.
Multiple electron oxidation of phenols by an oxo complex of ruthenium(IV)
作者:Won K. Seok、Thomas J. Meyer
DOI:10.1021/ja00230a016
日期:1988.10
Etudede la cinetiquedel'oxydation du phenol et de ses derives alkyles par [(bpy) 2 (py)Ru(IV)(O)] 2+ et [(bpy) 2 (py)Ru(III)(OH)] 2+ (bpy=bipyridyle-2,2' et py=pyridine) ensolution aqueuse et dans l'acetonitrile, pour donner les quinones correspondantes
Etude de la cinetique de l'oxydation du phenol et de ses 衍生烷基 [(bpy) 2 (py)Ru(IV)(O)] 2+ et [(bpy) 2 (py)Ru(III)(OH) ] 2+ (bpy=bipyridyle-2,2' et py=pyridine) en 溶液 aqueuse et dans l'乙腈,倒入 donner les quinones 对应物
Haptenes and Conjugates Derived from Pyocyanin, Antibodies Thereof, and Immunichemical Method for Detecting Infections Caused by Pseudomonas Aeruginosa
申请人:Marco Colas Maria Pilar
公开号:US20160033489A1
公开(公告)日:2016-02-04
The present invention relates to a compound of general formula I and to the use thereof as a hapten.
An object of the present invention is also a conjugate of said compound I with a carrier protein or fragment thereof, with a detectable labelling agent, or with a polymer or support, and to the use thereof for producing antibodies. Furthermore, the present invention also relates to a method for the detection and/or quantification of 1-hydroxyphenazine and/or pyocyanin using said antibodies and conjugates for the detection of infections caused by
Pseudomonas aeruginosa.
dearomatization of 2‐substituted phenols to either 1,2‐benzoquinols or their cyclodimers, catalyzed by 4,5‐dimethyl‐2‐iodoxybenzenesulfonic acid with Oxone, has been developed. Natural products such as biscarvacrol and lacinilene C methylether could be synthesized efficiently under mild reaction conditions. Furthermore, both the reaction rate and site selectivity could be further improved by the introduction of