Transition Metal Nanocluster Formation Kinetic and Mechanistic Studies. A New Mechanism When Hydrogen Is the Reductant:  Slow, Continuous Nucleation and Fast Autocatalytic Surface Growth

1997 ◽  
Vol 119 (43) ◽  
pp. 10382-10400 ◽  
Author(s):  
Murielle A. Watzky ◽  
Richard G. Finke
Keyword(s):  
Transition Metal ◽  
Surface Growth ◽  
Mechanistic Studies ◽  
Formation Kinetic ◽  
Metal Nanocluster ◽  
Continuous Nucleation

scholarly journals Transition-Metal-Free Boryl Substitution Using Silylboranes and Alkoxy Bases

Synlett ◽  
2017 ◽  
Vol 28 (11) ◽  
pp. 1258-1267 ◽  
Author(s):  
Hajime Ito ◽  
Eiji Yamamoto ◽  
Satoshi Maeda ◽  
Tetsuya Taketsugu
Keyword(s):  
Transition Metal ◽  
Functional Group ◽  
Experimental Studies ◽  
Transition Metal Catalysts ◽  
Alkyl Halides ◽  
Aryl Halides ◽  
Nucleophilic Attack ◽  
Important Class ◽  
Mechanistic Studies ◽  
Induced Reaction

Silylboranes are used as borylation reagents for organohalides in the presence of alkoxy bases without transition-metal catalysts. PhMe2Si–B(pin) reacts with a variety of aryl, alkenyl, and alkyl halides, including sterically hindered examples, to provide the corresponding organoboronates in good yields with high borylation/silylation ratios, showing good functional group compatibility. Halogenophilic attack of a silyl nucleophile on organohalides, and subsequent nucleophilic attack on the boron electrophile are identified to be crucial, based on the results of extensive theoretical and experimental studies. This boryl­ation reaction is further applied to the first direct dimesitylboryl (BMes2) substitution of aryl halides using Ph2MeSi–BMes2 and Na(O-t-Bu), affording aryldimesitylboranes, which are regarded as an important class of compounds for organic materials.1 Introduction2 Boryl Substitution of Organohalides with PhMe2Si–B(pin)/Alkoxy Bases3 Mechanistic Investigations4 DFT Mechanistic Studies Using an Artificial Force Induced Reaction (AFIR) Method5 Dimesitylboryl Substitution of Aryl Halides with Ph2MeSi–BMes2/Na(O-t-Bu)6 Conclusion

Transition Metal‐Controlled Direct Regioselective Intermolecular Amidation of C−H Bonds with Azodicarboxylates: Scope, Mechanistic Studies, and Applications

2018 ◽  
Vol 360 (21) ◽  
pp. 4205-4214 ◽  
Author(s):  
He‐Yuan Bai ◽  
Xin Fu ◽  
Jin‐Long Pan ◽  
Hai‐Qian Ma ◽  
Zhi‐Min Chen ◽  
...  
Keyword(s):  
Transition Metal ◽  
Mechanistic Studies

Rongalite-Induced Transition-Metal and Hydride-Free Reductive Aldol Reaction: A Rapid access to 3,3´- Disubstituted Oxindoles and Its Mechanistic Studies

2022 ◽  
Author(s):  
Sivaparwathi Golla ◽  
Naveenkumar Anugu ◽  
Swathi Jalagam ◽  
Hari Prasad Kokatla
Keyword(s):  
Transition Metal ◽  
Aldol Reaction ◽  
Dual Role ◽  
Biologically Active ◽  
Mechanistic Studies ◽  
Rapid Access ◽  
Reductive Aldol ◽  
Isatin Derivatives

A transition-metal and hydride-free reductive aldol reaction has been developed for the synthesis of biologically active 3,3´-disubstituted oxindoles from isatin-derivatives using rongalite. In this protocol, rongalite plays the dual role...

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