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ChirBase for ACD/Labs

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Index

 

Some research topics developed from ChirBase

 

Click on items for more information

 

Introduction

 

Enantiophore studies

Basic concept of enantiophore

Procedure

Enantiophore frequency analysis

Visualization of the most recurrent enantiophore

 

Molecular modeling

Conformations of diastereomeric complexes

Prediction of elution orders

Prediction of chromatographic data

 

Grid calculations and PLS analysis

Calculation scheme

Illustration of GRID calculation

Plot of predicted versus experimental enantioselectivities (PLS model)

PLS factor contributions for acceptor-lipophile enantiophore pairs

 

ChirBase 3D Database

Building a query in ChirBase from a Three-Interaction Points model

Whelk-O 1 receptor-based queries

Examples of sample fitting 3D-queries in ChirBase

Ligand-based queries

 

Similarity maps

Similarity maps of Crownpak CR, Whelk-O 1 and Chiralcel

Similarity maps comparing molecular diversity between two chiral columns

 

Cluster Analysis / Decision tree

Hierarchical clustering of chiral stationary phases

Cluster analysis (mobile phases)

Decision tree

 

 

 

Prediction of elution orders

- Conformational search

R-enantiomers (1st eluted)

multiple low energy conformations

Aryl stacking between the selector and ligand is not always present

 

 

 

S-enantiomers (2nd eluted)

Single most favourable binding

pi- pi interactions between selector and ligand drive the capacity factor trend.

 

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