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Studies on Palladium-Catalyzed Tadem C-H Activation/Biscyclization Reaction

Author: RenZhiHui
Tutor: LiangYongMin
School: Lanzhou University
Course: Organic Chemistry
Keywords: Palladium-catalyzed Vinyl palladium Allenyl palladium Palladium propargyl Palladium intermediate ring Oxidative addition C-H Activation Series connection Cyclization Coupling Alkyne Propargyl carbonate Carbocyclic compound Nucleophiles
CLC: O643.3
Type: Master's thesis
Year: 2009
Downloads: 333
Quote: 0
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Abstract


Palladium-catalyzed reactions in chemical production and laboratory synthesis plays an important role , is a transition metal-catalyzed reactions is an important branch of chemistry , while palladium-catalyzed synthesis of carbon-carbon bonds in organic synthesis has become an important research direction . In this thesis, palladium-catalyzed alkyne learning tandem cyclization mechanism and its application in the synthesis methodology , based on the palladium-catalyzed mainly studied the series CH Activation / bicyclic reaction, and its research and development context of the work done brief , including the following two elements: the first chapter : Summary of recent palladium-catalyzed cyclization of alkyne progress , according to the reaction process, we will be divided into three categories: 1 ) via π- alkyne complex cyclization material , 2) 2η- alkynyl - organic palladium cyclization of the Commonwealth , 3) palladium intermediate allenyl cyclization . Which focuses on the palladium-catalyzed propargyl carbonate with the affinity reagent . After a brief introduction of our lab while palladium catalyzed reaction of learning, through the promotion of organic palladium intermediates ortho nucleophilic center cyclization of alkyne derivatives synthesized indene derivatives research progress and results. Chapter II : Introduction of the palladium-catalyzed tandem CH activation / Progress bicyclic reaction , and the reaction was extended such research . We discovered a novel class of compounds and by the terminal alkyne propargyl tandem CH activation triggered / bicyclic reaction , synthesis of a class of tetracyclic aromatic derivatives. The reaction step to build a three CC bond and two carbon ring , on the reaction substrate we conducted a series of expansion , the reaction, not only the aromatic ring can be cyclized CH bond , can also be simply activated CH . Furthermore we delve into the reaction mechanism , based on deuterated experiments , the reaction mechanism put forward a reasonable explanation .

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CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > Chemical kinetics,catalysis > Catalytic
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