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ACD/Labs Blog

Sherry Myles
Sanofi partnered with ACD/Labs to develop an automated lab tool combining LC/MS and 1H NMR to help organic chemists efficiently verify their structures. This tool collects, compiles, and evaluates the analytical data and the proposed structure once they are available, and sends the results to the chemist. The pilot project for this system is presented...

Sherry Myles
The Pfizer Structure Elucidation Group (SEG) spans two continents, supporting research and development in the UK and USA. In this presentation John talks about their structure elucidation workflow for assisted data processing and analysis, and centralized data management. John also presents some interesting case studies of puzzled they have solved.

Joel Michalski
Calculation of solution-state NMR parameters, including chemical shift values and scalar coupling constants, is often a crucial step for unambiguous structure assignment. Data-driven (sometimes called empirical) methods leverage databases of known parameter values to estimate parameters for unknown or novel molecules. This is in contrast to popular ab initio techniques that use detailed quantum computational chemistry...

Joel Michalski
The recent revival of the study of organic natural products as renewable sources of medicinal drugs, cosmetics, dyes, and materials motivated the creation of general purpose structural databases. Dereplication, the efficient identification of already reported compounds, relies on the grouping of structural, taxonomic and spectroscopic databases that focus on a particular taxon (species, genus, family,...

Joel Michalski
NMR spectroscopy is a powerful tool for structural analysis of solids, especially if it is complemented by computations of NMR observables, such as chemical shifts and quadrupole coupling constants. In paramagnetic solids, chemical shifts can be greatly affected by hyperfine couplings among the unpaired electrons and atomic nuclei. In this study 13C MAS NMR spectra of...

Sherry Myles
The role and importance of the identification of natural products are discussed in the perspective of the study of secondary metabolites. The rapid identification of already reported compounds, or structural dereplication, is recognized as a key element in natural product chemistry. The biological taxonomy of metabolite producing organisms, the knowledge of metabolite molecular structures, and...

Joel Michalski
Hypervalent (HV) iodine(III) compounds with fluorine-containing ligands reacted, in the presence of iodine or copper salts, with the double bonds in cis-1,4-polyisoprene (polyIP) to afford fluorine-containing polymers. This article describes the use of NMR Predictors to predict the chemical shifts of low molecular weight analogs of modified polyIP.