By A. Stephen K. Hashmi, F. Dean Toste
With its striking positive factors, gold has ended in thoroughly new response kinds lately, which in flip have strongly encouraged both
natural catalysis and fabric technology. different fields the place an important quantity of recent effects has been received comprise nanotechnology,
self assembly/supramolecular platforms and biochemical/medicinal chemistry. hence, gold is among the most popular issues in catalysis at
the instant, with an expanding quantity of analysis being performed during this field.
whereas targeting homogeneous catalysis, this monograph additionally covers the most purposes in heterogeneous catalysis. Following
a glance on the gold-catalyzed addition of heteroatom nucleophiles to alkynes, it is going directly to speak about gold-catalyzed additions to allenes and
alkenes, gold-catalyzed benzannulations, cycloisomerization and rearrangement reactions, in addition to oxidation and aid reactions.
the complete is completed off with a bit on gold-catalyzed aldol and similar reactions and the applying of gold-catalyzed reactions to natural
Of curiosity to man made chemists and inorganic chemists, in addition to natural chemists operating in homogeneous catalysis, actual and
Chapter 1 Hydrochlorination of Acetylene Catalyzed by way of Gold (pages 1–26): Marco Conte and Graham J. Hutchings
Chapter 2 Gold?Catalyzed aid Reactions (pages 27–54): Avelino Corma and Pedro Serna
Chapter three Gold?Catalyzed Benzannulations: Asao–Yamamoto Benzopyrylium Pathway (pages 55–73): Naoki Asao and Yoshinori Yamamoto
Chapter four Gold?Catalyzed Reactions of Propargyl Esters, Propargyl Alcohols, and comparable Compounds (pages 75–134): Pablo Mauleon and Prof. F. Dean Toste
Chapter five Intramolecular Hydroarylation of Alkynes (pages 135–152): Paula de Mendoza and Antonio M. Echavarren
Chapter 6 Gold–Alkyne Complexes (pages 153–173): Maria Agostina Cinellu
Chapter 7 Gold–Alkene Complexes (pages 175–199): Maria Agostina Cinellu
Chapter eight Hydration and Hydroalkoxylation of CC a number of Bonds (pages 201–235): J. Henrique Teles
Chapter nine Gold?Catalyzed Aldol and similar Reactions (pages 237–261): Christoph Hubbert and Prof. Dr. A. Stephen okay. Hashmi
Chapter 10 Gold?Catalyzed Oxidation Reactions: Oxidation of Alkenes (pages 263–272): Yuanhong Liu
Chapter eleven Gold?Catalyzed Oxygen?Atom move to Alkynes (pages 273–296): Maria Camila Blanco Jaimes and Prof. Dr. A. Stephen ok. Hashmi
Chapter 12 Gold?Catalyzed Additions to Alkenes: N?Nucleophiles (pages 297–302): Zigang Li, David A. Capretto and Chuan He
Chapter thirteen Gold?Catalyzed Additions to Alkenes: O?Nucleophiles (pages 303–307): Zigang Li, David A. Capretto and Chuan He
Chapter 14 Oxidation of Alcohols and Carbohydrates (pages 309–329): Cristina Della Pina, Ermelinda Falletta and Michele Rossi
Chapter 15 functions of Gold?Catalyzed Reactions to usual Product Synthesis (pages 331–362): Matthias Rudolph
Chapter sixteen Gold?Catalyzed Addition Reactions to Allenes (pages 363–389): Christian wintry weather and Norbert Krause
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Additional resources for Modern Gold Catalyzed Synthesis
It is possible that the reactivation of the gold site by HCl after desorption of the vinyl chloride product is the crucial step, leading to the observation of this correlation. It is also likely that a similar mechanism operates for all of the materials evaluated as catalysts to date, because all of the reaction data that we have obtained agree with this correlation [11, 21, 24, 51]. A distinctive characteristic in the use of gold catalysts towards hydrochlorination reactions is its exceptional selectivity, which can be considered the highest among metal-supported catalysts.
This is obtained via addition of HCl (27), with the H that gives the ﬁnal organic substrate (28), and the Cl atom that regenerates the catalyst (29). It is worth noting that if C2H2 is present instead of HCl in the regeneration step, it is possible to obtain a conjugate polymer with an even number of carbon atoms. It is important to note that in the proposed model, the ﬁnal product results from an anti addition of HCl and this can only be obtained via the complex, as it cannot be obtained via a pure Eley–Rideal model, which is the case of a pure Au3þ center would undergo a pure carbocationic intermediate.
J References 25 Finally, the third industrial route is the so-called balance process . This name is derived from the fact that it combines the oxychlorination reaction of ethylene to obtain 1,2-dichloroethane, and subsequent dehydrochlorination, in the same process, and can be represented schematically by CH2 ¼ CH2 þ 2HCl þ O2 ! 2CH2 ClCH2 Cl þ 2H2 O ð1:14Þ CH2 ClCH2 Cl ! CH2 ¼ CHCl þ HCl ð1:15Þ Until recently most VCM was obtained using this third route , owing to the ready availability of ethylene as an oil-derived feedstock.