Synthesis of thioesters through copper-catalyzed coupling of aldehydes with thiols in water
作者:Chih-Lun Yi、Yu-Ting Huang、Chin-Fa Lee
DOI:10.1039/c3gc40946e
日期:——
Copper-catalyzed C–S bond formation between aldehydes and thiols in the presence of TBHP as an oxidant is described. Functional groups including chloro, trifluoromethyl, bromo, iodo, nitrile, ester and thiophene are all tolerated by the reaction conditions employed. This reaction is performed in water without the use of a surfactant. Both aryl and alkyl aldehydes couple suitably with aryl- and alkyl thiols, affording the corresponding thioesters in moderate to good yields.
The preparation of polyfunctional organometallics is important in organic synthesis as these reagents are very popular nucleophiles. The preparation of functionalized aluminium reagents by directinsertion of aluminium powder is in general not possible. Such a reaction would be of special importance owing to the low price of aluminium compared with magnesium (it is half the price), the low toxicity
Metal-free cross-coupling reaction of aldehydes with disulfides by using DTBP as an oxidant under solvent-free conditions
作者:Jing-Wen Zeng、Yi-Chen Liu、Ping-An Hsieh、Yu-Ting Huang、Chih-Lun Yi、Satpal Singh Badsara、Chin-Fa Lee
DOI:10.1039/c4gc00025k
日期:——
A DTBP-promoted C–H thiolation of aldehydes with disulfides under metal-free and solvent-free conditions is described. The system shows good functional group tolerance to afford thioesters in moderate to excellent yields.
[DE] VERFAHREN ZUR HERSTELLUNG VON ORGANOALUMINIUMVERBINDUNGEN UND DEREN VERWENDUNG<br/>[EN] METHOD FOR PRODUCING ORGANOALUMINIUM COMPOUNDS AND USE THEREOF<br/>[FR] PROCÉDÉ DE PRODUCTION DE COMPOSÉS ORGANOALUMINIUM ET LEUR UTILISATION
申请人:UNIV MUENCHEN L MAXIMILIANS
公开号:WO2011023791A2
公开(公告)日:2011-03-03
Die vorliegende Erfindung offenbart ein Verfahren zur Herstellung von Organoaluminiumverbindungen der Formel (I) R1a - Al - Xb durch Umsetzung einer Verbindung R1-X mit elementarem Aluminium in Gegenwart von mindestens einem Additiv oder Additivkombinationen. Die Erfindung offenbart auch eine Organoaluminiumverbindung erhältlich gemäß einem Verfahren der Erfindung, die Verwendung dieser Organoaluminiumverbindungen für die Reaktion mit Elektrophilen und die Herstellung einer organischen Verbindung, wobei die Organoaluminiumverbindung mit einem Elektrophil umgesetzt wird.
Palladium-Catalyzed Coupling of Thiol Esters with Aryl and Primary and Secondary Alkyl Organoindium Reagents
作者:Bryan W. Fausett、Lanny S. Liebeskind
DOI:10.1021/jo050110u
日期:2005.6.1
undergo palladium-catalyzedcross-coupling under mild conditions to give ketones in moderate to excellent yields. Aryl and primary/secondary alkyl organoindium reagents can be used as coupling partners. This method has two advantages over the cross-coupling of thiol esters with boron and tin reagents: (1) no added copper reagent is required to mediate the reaction and (2) for the case of alkyl transfer