Efficient ruthenium and copper cocatalzyed five-component coupling to form dipropargyl amines under mild conditions in water
作者:E. Ryan Bonfield、Chao-Jun Li
DOI:10.1039/b613596j
日期:——
Dipropargyl amines are synthesized by a double direct alkynylation of primary followed by secondary imines formed in situ during an efficient, five-component, one-pot couplingreactioncocatalyzed by ruthenium and copper in water.
copper-catalyzed multicomponent coupling reaction of primary aromatic amines, rongalite, and alkynes for the direct synthesis of N-aryl propargylamines has been developed. This method could overcome the substrate limitation in A3 coupling reactions of primary aromatic amines, formaldehyde, and alkynes. Mechanisticstudies revealed that rongalite acts as not only the active C1 unit but also the accelerator
pharmaceutical properties of organic compounds make allenes a desirable choice in various applications. Here, we report a facile method for the atom-economical synthesis of propargyl allenylamines via an underdeveloped [2,3]-sigmatropic rearrangement. Our strategy employs easily accessible propargylamines as starting materials, which are first converted into propargyl ammonium salts, followed by a base-promoted
Facile and Selective Synthesis of Propargylic Amines and 1,6-Diynes: One-Pot Three-Component Coupling Reactions of Alkynylsilanes, Aldehydes and Amines by a Cooperative Catalytic System Comprised of CuCl and Cu(OTf)<sub>2</sub>
作者:Norio Sakai、Naoki Uchida、Takeo Konakahara
DOI:10.1055/s-2008-1077790
日期:2008.6
Described herein is a three-component coupling reaction of alkynylsilanes, aldehydes and amines by a cooperative catalytic system comprised of CuCl and Cu(OTf)(2), leading to the production of a variety of propargyl amine derivatives. This catalytic system was successfully applied to the practical preparation of 1,6-diyne derivatives via twice-performed, domino-type coupling reactions.
A New Strategy for the Synthesis of Bis(alkadiynyl)amines and Azacycloalkadiynes Using Copper-Containing Catalysts
An efficient method for the preparation of N-alkyl-N,N-di(alkadiynyl)amines and 1-alkyl-1-azacycloalkadiynes is developed via the aminomethylation reaction of ,-diacetylenes with N-alkyl-N,N-bis(ethoxymethyl)amines in the presence of copper halides as the catalysts.