Recent advances in the selective functionalization of anionic icosahedral boranes and carboranes

2021 ◽  
pp. 343-389
Author(s):  
Mustapha Hamdaoui ◽  
Rajesh Varkhedkar ◽  
Jizeng Sun ◽  
Fan Liu ◽  
Simon Duttwyler
Keyword(s):  
Selective Functionalization ◽  
Recent Advances

scholarly journals Recent advances in site-selective functionalization of carbohydrates mediated by organocatalysts

2019 ◽  
Vol 471 ◽  
pp. 64-77 ◽  
Author(s):  
Stephanie A. Blaszczyk ◽  
Timothy C. Homan ◽  
Weiping Tang
Keyword(s):  
Selective Functionalization ◽  
Recent Advances ◽  
Site Selective

scholarly journals Site-selective functionalization of remote aliphatic C–H bonds via C–H metallation

2021 ◽  
Author(s):  
Qi Zhang ◽  
Bing-Feng Shi
Keyword(s):  
Selective Functionalization ◽  
Recent Advances ◽  
Site Selective

Recent advances in site-selective functionalization of remote aliphatic C–H bonds in organometallic pathways are summarized.

Chiral reagents in glycosylation and modification of carbohydrates

2018 ◽  
Vol 47 (3) ◽  
pp. 681-701 ◽  
Author(s):  
Hao-Yuan Wang ◽  
Stephanie A. Blaszczyk ◽  
Guozhi Xiao ◽  
Weiping Tang
Keyword(s):  
Chiral Auxiliaries ◽  
Chiral Catalysts ◽  
Stereoselective Glycosylation ◽  
Selective Functionalization ◽  
Recent Advances ◽  
Site Selective

This review summarizes recent advances in stereoselective glycosylation and site-selective functionalization of carbohydrates mediated by chiral reagents including chiral auxiliaries and chiral catalysts.

Synthesis of sulfones via selective C–H-functionalization

2017 ◽  
Vol 15 (9) ◽  
pp. 1947-1955 ◽  
Author(s):  
Saad Shaaban ◽  
Shuai Liang ◽  
Nai-Wei Liu ◽  
Georg Manolikakes
Keyword(s):  
Selective Functionalization ◽  
Recent Advances

This review highlights recent advances in the synthesis of sulfones via the selective functionalization of C–H-bonds.

scholarly journals Intramolecular C(sp3)–H Bond Amination Strategies for the Synthesis of Saturated N-containing Heterocycles

2020 ◽  
Vol 74 (11) ◽  
pp. 895-903
Author(s):  
Jiayu Zhang ◽  
Mónica H. Pérez-Temprano
Keyword(s):  
Transition Metal ◽  
Reductive Elimination ◽  
Efficient Manner ◽  
Bond Forming ◽  
The Past ◽  
Selective Functionalization ◽  
Recent Advances ◽  
Bond Forming Reactions ◽  
Transition Metal Catalyzed ◽  
Metal Catalyzed

The selective functionalization of C(sp3)–H bonds via intramolecular amination reactions represents a very attractive strategy for the construction of saturated N-containing heterocycles (SNHets). Over the past de- cades, the chemical community has devoted its efforts towards expanding the synthetic toolbox with the aim of facilitating access to these key fragments in a controllable, reproducible and efficient manner. This review covers selected examples of the most recent advances in intramolecular C(sp3)–N bond-forming reactions by three main approaches: (1) the Hofmann-Löffler-Freytag (HLF) reaction; (2) transition-metal-catalyzed nitrene C(sp3)–H inser- tion; and (3) transition-metal-catalyzed ligand-assisted C(sp3)–N bond-forming reactions via a reductive elimination step. We will discuss reactivity, selectivity and the major mechanistic insights into these transformations.

Recent Advances in High Dispersion Spectroscopy of Globular Cluster Stars

1988 ◽  
Vol 132 ◽  
pp. 525-530
Author(s):  
Raffaele G. Gratton
Keyword(s):  
Globular Cluster ◽  
Globular Clusters ◽  
High Dispersion ◽  
Photographic Material ◽  
Recent Advances ◽  
Metal Abundances ◽  
Ccd Detectors ◽  
Major Progress

The use CCD detectors has allowed a major progress in abundance derivations for globular cluster stars in the last years. Abundances deduced from high dispersion spectra now correlates well with other abundance indicators. I discuss some problems concerning the derivation of accurate metal abundances for globular clusters using high dispersion spectra from both the old photographic and the most recent CCD data. The discrepant low abundances found by Cohen (1980), from photographic material for M71 giants, are found to be due to the use of too high microturbulences.

Chelation-assisted transition metal-catalysed C–H chalcogenylations

2020 ◽  
Vol 7 (8) ◽  
pp. 1022-1060 ◽  
Author(s):  
Wenbo Ma ◽  
Nikolaos Kaplaneris ◽  
Xinyue Fang ◽  
Linghui Gu ◽  
Ruhuai Mei ◽  
...  
Keyword(s):  
Transition Metal ◽  
Recent Advances ◽  
Site Selectivity ◽  
Transition Metal Catalyzed ◽  
Metal Catalyzed

This review summarizes recent advances in C–S and C–Se formations via transition metal-catalyzed C–H functionalization utilizing directing groups to control the site-selectivity.

Nucleosome dynamics

2006 ◽  
Vol 73 ◽  
pp. 109-119 ◽  
Author(s):  
Chris Stockdale ◽  
Michael Bruno ◽  
Helder Ferreira ◽  
Elisa Garcia-Wilson ◽  
Nicola Wiechens ◽  
...  
Keyword(s):  
High Resolution ◽  
Chromatin Structure ◽  
Current Knowledge ◽  
Dynamic Properties ◽  
Structure And Dynamics ◽  
Nucleosome Dynamics ◽  
Sharp Focus ◽  
Recent Advances ◽  
Insight Into ◽  
Chromatin Structure And Dynamics

In the 30 years since the discovery of the nucleosome, our picture of it has come into sharp focus. The recent high-resolution structures have provided a wealth of insight into the function of the nucleosome, but they are inherently static. Our current knowledge of how nucleosomes can be reconfigured dynamically is at a much earlier stage. Here, recent advances in the understanding of chromatin structure and dynamics are highlighted. The ways in which different modes of nucleosome reconfiguration are likely to influence each other are discussed, and some of the factors likely to regulate the dynamic properties of nucleosomes are considered.

Recent Advances in the Treatment of Pulmonary Tuberculosis

1950 ◽  
Vol 34 (5) ◽  
pp. 1363-1380
Author(s):  
Theodore L. Badger ◽  
William E. Patton
Keyword(s):  
Pulmonary Tuberculosis ◽  
Recent Advances
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