Selective transformations mediated by main-group organometallics

2000 ◽  
Vol 72 (9) ◽  
pp. 1699-1703 ◽  
Author(s):  
Paul Knochel ◽  
Andreas Boudier ◽  
Lars O. Bromm ◽  
Eike Hupe ◽  
Jesús A. Varela ◽  
...  
Keyword(s):  
Temperature Scale ◽  
Bond Formation ◽  
Main Group ◽  
Catalytic Reactions ◽  
Thermal Rearrangement ◽  
Open Chain ◽  
Indole Synthesis

Main-group organometallics are useful intermediates for the chemoselective and diastereoselective C-C bond formation. The boron-zinc exchange is a unique way for preparing chiral secondary alkylzinc reagents which are configurationally stable over a wide temperature scale. Coupled with the thermal rearrangement of tertiary organoboranes, a broad range of open-chain and cyclic polyfunctional molecules have been prepared. In addition, several examples of a diastereoselective remote C-H activation have been studied. The second part shows that the main-group metallic alkoxides such as t-BuOK can be used for the performance of catalytic reactions such as a new indole synthesis.

scholarly journals Nickel Complexes in C‒P Bond Formation

Molecules ◽  
2021 ◽  
Vol 26 (17) ◽  
pp. 5283
Author(s):  
Almaz A. Zagidullin ◽  
Il’yas F. Sakhapov ◽  
Vasili A. Miluykov ◽  
Dmitry G. Yakhvarov
Keyword(s):  
Bond Formation ◽  
Nickel Complexes ◽  
Catalytic Reactions ◽  
Comprehensive Account ◽  
Phosphorus Chemistry

This review is a comprehensive account of reactions with the participation of nickel complexes that result in the formation of carbon–phosphorus (C‒P) bonds. The catalytic and non-catalytic reactions with the participation of nickel complexes as the catalysts and the reagents are described. The various classes of starting compounds and the products formed are discussed individually. The several putative mechanisms of the nickel catalysed reactions are also included, thereby providing insights into both the synthetic and the mechanistic aspects of this phosphorus chemistry.

scholarly journals Recent advances in the Carbon–Phosphorus (C–P) bond formation from unsaturated compounds by s- and p-block metals

2021 ◽  
Author(s):  
Tarun Kanti Panda ◽  
Indrani Banerjee
Keyword(s):  
Bond Formation ◽  
Main Group ◽  
Metal Chemistry ◽  
Main Group Metals ◽  
The Past ◽  
Unsaturated Compounds ◽  
Recent Advances

Researchers around the globe have witnessed several breakthroughs in s- and p-block metal chemistry. Over the past few years, several applications in catalysis associated with these main group metals have...

Photochemical and thermal rearrangement of heavier main-group element azides

1986 ◽  
Vol 19 (1) ◽  
pp. 17-23 ◽  
Author(s):  
Guy Bertrand ◽  
Jean Pierre Majoral ◽  
Antoine Baceiredo
Keyword(s):  
Main Group ◽  
Group Element ◽  
Thermal Rearrangement ◽  
Main Group Element

Recent development in functionalized ionic liquids as reaction media and promoters

2012 ◽  
Vol 90 (1) ◽  
pp. 1-16 ◽  
Author(s):  
Wing-Leung Wong ◽  
Kwok-Yin Wong
Keyword(s):  
Ionic Liquids ◽  
Organic Solvents ◽  
Chemical Reactions ◽  
Reaction Rate ◽  
Bond Formation ◽  
Catalytic Reactions ◽  
Important Chemical ◽  
Reaction Media

The recent development in the use of functionalized ionic liquids as both reaction media and promoters is reviewed. Ionic liquids designed with special functionality can enhance the reaction rate, selectivity, and productivity in various chemical reactions. In this context, some important chemical reactions involving C–C, C–O, C–N, and C–S bond formation in functionalized ionic liquids are discussed. These functionalized ionic liquids were found to provide distinct advantages over conventional organic solvents in these catalytic reactions.

Kinetic studies on cyclopalladation in palladium(II) complexes containing an indole moiety

2014 ◽  
Vol 86 (2) ◽  
pp. 151-161 ◽  
Author(s):  
Satoshi Iwatsuki ◽  
Takuya Suzuki ◽  
Syogo Tanooka ◽  
Tatsuo Yajima ◽  
Yuichi Shimazaki
Keyword(s):  
Bond Formation ◽  
Kinetic Studies ◽  
Catalytic Reactions ◽  
Biological Molecules ◽  
Side Chain ◽  
Formation Mechanisms ◽  
Indole Derivatives ◽  
Reaction Intermediates ◽  
Pd Catalysts ◽  
Amino Acid Tryptophan

Abstract Various Pd–C complexes have been developed to date, affording deep insights into the reaction intermediates in useful catalytic reactions in organic syntheses. Cyclopalladation is one of the most famous Pd–C bond formation reactions to generate the palladacycles. Indole is an electron-rich aromatic ring involved in the side chain of an essential amino acid, tryptophan (Trp), and Trp and its derivatives are important in biological systems, such as electron transfer in protein, cofactors for conversion of biological molecules and so on. Pd catalysts are also useful for syntheses of such indole derivatives, and the mechanisms are considered to be through the Pd–C intermediates. However, the detailed properties and formation mechanisms of Pd–indole species are still unclear. With these points in mind, we focus on Pd(II)–indole-C2 carbon bond formations using various Pd(II) complexes having an indole moiety, especially on the recent studies on the kinetic analyses for these cyclopalladation reactions and their detailed mechanisms.

Oxidative Bond Formation and Reductive Bond Cleavage at Main Group Metal Centers: Reactivity of Five-Valence-Electron MX2 Radicals

2014 ◽  
Vol 136 (31) ◽  
pp. 10902-10905 ◽  
Author(s):  
Andrey V. Protchenko ◽  
Deepak Dange ◽  
Matthew P. Blake ◽  
Andrew D. Schwarz ◽  
Cameron Jones ◽  
...  
Keyword(s):  
Valence Electron ◽  
Bond Cleavage ◽  
Bond Formation ◽  
Main Group ◽  
Metal Centers ◽  
Group Metal ◽  
Main Group Metal
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