scholarly journals A Chiral Sulfoxide-Based C–H Acid

Synlett ◽  
2021 ◽  
Author(s):  
Benjamin List ◽  
Denis Höfler ◽  
Karl Kaupmees ◽  
Ivo Leito
Keyword(s):  
Single Crystal ◽  
Lewis Acid ◽  
Absolute Configuration ◽  
X Ray ◽  
Design And Synthesis ◽  
High Acidity ◽  
Acid Catalyzed ◽  
Brønsted And Lewis Acid

We report the design and synthesis of a strong, chiral, enantiopure sulfoxide-based C–H acid. Single crystal X-ray analysis confirms the proposed structure and its absolute configuration. The new motif shows a high acidity and activity in Brønsted and Lewis acid catalyzed transformations. So far, only low enantioselectivities were achieved.

Design and synthesis of novel pyrazoline derivatives for their spectroscopic, single crystal X-ray and biological studies

2021 ◽  
Vol 1234 ◽  
pp. 130131
Author(s):  
Mohammad Asad ◽  
Salman A. Khan ◽  
Muhammad Nadeem Arshad ◽  
Abdullah M. Asiri ◽  
Mohd Rehan
Keyword(s):  
Single Crystal ◽  
X Ray ◽  
Design And Synthesis ◽  
Biological Studies

Crystal structures of (S)- and (R,S)-2,2′-bipyridine-3,3′-dicarboxylic acid 1,1′-dioxides and of their barium salts: absolute configuration and molecular distortion enforced by supramolecular self-assembly

1997 ◽  
Vol 212 (3) ◽  
Author(s):  
P. Vojtíšek ◽  
I. Císařová ◽  
J. Podlaha ◽  
Z. Žák ◽  
S. Böhm ◽  
...  
Keyword(s):  
Single Crystal ◽  
Dicarboxylic Acid ◽  
Crystal Structures ◽  
Absolute Configuration ◽  
Self Assembly ◽  
Barium Salt ◽  
X Ray Diffraction ◽  
X Ray

AbstractCrystal structures of the title compounds were determined by single crystal X-ray diffraction. Absolute configuration of the barium salt of (+)-(

scholarly journals Some experimental aspects of absolute configuration determination using single crystal X-ray diffraction

2017 ◽  
Vol 28 (10) ◽  
pp. 1330-1336 ◽  
Author(s):  
Amber L. Thompson ◽  
Sarah F. Jenkinson ◽  
George W.J. Fleet
Keyword(s):  
Single Crystal ◽  
Absolute Configuration ◽  
X Ray Diffraction ◽  
X Ray

An Intramolecular Boron Nitrogen Lewis Acid Base Pair on a Rigid Naphthyl Backbone

2012 ◽  
Vol 67 (6) ◽  
pp. 589-593 ◽  
Author(s):  
Daniel Winkelhaus ◽  
Beate Neumann ◽  
Norbert W. Mitzel
Keyword(s):  
Nmr Spectroscopy ◽  
Single Crystal ◽  
Lewis Acid ◽  
Elemental Analysis ◽  
Base Pair ◽  
Ring System ◽  
X Ray Diffraction ◽  
Acid Base ◽  
X Ray ◽  
Boron Nitrogen

The reaction of (C6F5)2BCl with 8-lithio-N,N-dimethyl-1-naphthylamine (1) afforded the fivemembered ring system 8-bis(pentafluorophenyl)boryl-N,N-dimethyl-1-naphthylamine (2) with an intramolecular dative B-N bond. The compound was characterised by elemental analysis, NMR spectroscopy and single-crystal X-ray diffraction.

Die absolute Konfiguration der Juglomycine/The Absolute Configuration of the Juglomycins

1989 ◽  
Vol 44 (3) ◽  
pp. 345-352 ◽  
Author(s):  
Johann Krupa ◽  
Helmut Lackner ◽  
Peter G. Jones ◽  
Karen Schmidt-Bäse ◽  
George M. Sheldrick
Keyword(s):  
Single Crystal ◽  
Structure Analysis ◽  
Absolute Configuration ◽  
X Ray ◽  
The Absolute ◽  
Dibromo Derivative

The absolute configurations of the known juglomycins A (1) and B (2) have been elucidated by single crystal X-ray structure analysis of 1 and its 6,8-dibromo derivative (1b). The structure of 2 has been corrected; it differs from 1 in its configuration at C-4', and not at C-3' as previously assumed. Relationships with the closely related isochromanquinone antibiotics are discussed.

Acid-catalyzed cyclization of 3,3',4,4'-tetrahydro-1,1'-binaphthyl and single-crystal x-ray structure determination of a polycyclic stable ozonide

1984 ◽  
Vol 49 (6) ◽  
pp. 1030-1033 ◽  
Author(s):  
Thomas K. Dobbs ◽  
Arnold R. Taylor ◽  
Julie A. Barnes ◽  
Belma D. Iscimenler ◽  
Elizabeth M. Holt ◽  
...  
Keyword(s):  
Single Crystal ◽  
Structure Determination ◽  
X Ray ◽  
Acid Catalyzed

A novel lipid from the brown alga Notheia anomala

1980 ◽  
Vol 33 (4) ◽  
pp. 891 ◽  
Author(s):  
RG Warren ◽  
RJ Wells ◽  
JF Blount
Keyword(s):  
Single Crystal ◽  
Spectral Data ◽  
Absolute Configuration ◽  
Brown Alga ◽  
X Ray ◽  
Relative Stereochemistry ◽  
The Absolute

The brown alga Notheia anomala has yielded a C19 lipid diol, (6S,7S,9R,10R)-6,9-epoxynonadec-18-ene-7,10-diol, as the major component. The structure, assigned on the basis of spectral data, was confirmed by single-crystal X-ray analysis, which also established the relative stereochemistry. The absolute configuration was determined on the monoacetate by the Horeau method.

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