ChemInform Abstract: Recent Progress Using Chiral Formamidines in Asymmetric Syntheses

ChemInform ◽  
2010 ◽  
Vol 23 (29) ◽  
pp. no-no
Author(s):  
A. I. MEYERS
Keyword(s):  
Recent Progress ◽  
Asymmetric Syntheses

scholarly journals Recent applications of chiral calixarenes in asymmetric catalysis

2018 ◽  
Vol 14 ◽  
pp. 1389-1412 ◽  
Author(s):  
Mustafa Durmaz ◽  
Erkan Halay ◽  
Selahattin Bozkurt
Keyword(s):  
Asymmetric Catalysis ◽  
Recent Progress ◽  
Three Dimensional ◽  
Asymmetric Syntheses

The use of calixarenes in asymmetric catalysis is receiving increasing attention due to their tunable three-dimensional molecular platforms along with their easy syntheses and versatile modification at the upper and lower rims. This review summarizes the recent progress of synthesis and use of chiral calixarenes in asymmetric syntheses which emerged later than 2010.

scholarly journals Recent progress toward the asymmetric synthesis of carbon-substituted piperazine pharmacophores and oxidative related heterocycles

2020 ◽  
Vol 11 (7) ◽  
pp. 745-759
Author(s):  
Plato A. Magriotis
Keyword(s):  
Asymmetric Synthesis ◽  
Recent Progress ◽  
Chemical Space ◽  
Asymmetric Syntheses ◽  
The Subject ◽  
Substituted Piperazine

The piperazine drugs are mostly N-substituted compared to only a few C-substituted drugs. To explore this unknown chemical space, asymmetric syntheses of C-substituted piperazines is the subject of this review.

Efficient asymmetric syntheses of alkaloids and medicinally relevant molecules based on heterocyclic chiral building blocks

2014 ◽  
Vol 86 (7) ◽  
pp. 1227-1235 ◽  
Author(s):  
Ai-E Wang ◽  
Pei-Qiang Huang
Keyword(s):  
Asymmetric Synthesis ◽  
Recent Progress ◽  
Building Blocks ◽  
Prostaglandin E ◽  
Asymmetric Syntheses ◽  
Total Syntheses ◽  
Lead Compounds ◽  
Chiral Building Block ◽  
Block Based ◽  
Synthetic Methodologies

AbstractIn this report, we present recent progress in synthetic methodologies based on three heterocyclic chiral building blocks developed from our laboratories. The potential of these chiral building block-based methods in the concise asymmetric synthesis of alkaloids and medicinally interesting molecules has been demonstrated by the total syntheses of 8-aza-prostaglandin E1, 11-hydroxylated analogues of the lead compounds CP-734432 and PF-04475270, (+)-castanospermine, (+)-1-epi-castanospermine, 7-deoxy-6-epi-castanospermine as well as 9-epi-sessilifoliamide J.

Electron-Mirror Microscopic Aspects of Ferroelectric Domains of BaTiO3 And Ca2Sr (C2H5CO2)6

1970 ◽  
Vol 28 ◽  
pp. 478-479
Author(s):  
Teruo Someya ◽  
Jinzo Kobayashi
Keyword(s):  
Surface Layer ◽  
Electric Fields ◽  
Quantitative Study ◽  
Recent Progress ◽  
Ferroelectric Domain ◽  
Resolving Power ◽  
Surface Pattern ◽  
Crystal Surfaces ◽  
One Dimensional ◽  
Ferroelectric Domains

Recent progress in the electron-mirror microscopy (EMM), e.g., an improvement of its resolving power together with an increase of the magnification makes it useful for investigating the ferroelectric domain physics. English has recently observed the domain texture in the surface layer of BaTiO3. The present authors ) have developed a theory by which one can evaluate small one-dimensional electric fields and/or topographic step heights in the crystal surfaces from their EMM pictures. This theory was applied to a quantitative study of the surface pattern of BaTiO3).

The Nature of Oxide Surfaces: Topographic and Electronic Structure

1993 ◽  
Vol 51 ◽  
pp. 966-967
Author(s):  
Dawn A. Bonnell ◽  
Yong Liang
Keyword(s):  
Transition Metal Oxides ◽  
Electronic Structures ◽  
Recent Progress ◽  
Spatial Localization ◽  
Level Of Detail ◽  
Scanning Tunneling ◽  
Oxide Surfaces ◽  
Tunneling Microscopy ◽  
Considerable Effort ◽  
Complete Understanding

Recent progress in the application of scanning tunneling microscopy (STM) and tunneling spectroscopy (STS) to oxide surfaces has allowed issues of image formation mechanism and spatial resolution limitations to be addressed. As the STM analyses of oxide surfaces continues, it is becoming clear that the geometric and electronic structures of these surfaces are intrinsically complex. Since STM requires conductivity, the oxides in question are transition metal oxides that accommodate aliovalent dopants or nonstoichiometry to produce mobile carriers. To date, considerable effort has been directed toward probing the structures and reactivities of ZnO polar and nonpolar surfaces, TiO2 (110) and (001) surfaces and the SrTiO3 (001) surface, with a view towards integrating these results with the vast amount of previous surface analysis (LEED and photoemission) to build a more complete understanding of these surfaces. However, the spatial localization of the STM/STS provides a level of detail that leads to conclusions somewhat different from those made earlier.

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