Work

Supramolecular Interactions as Key in Racemic Resolution: New Insights into the (SSi)‐ and (RSi)‐Diastereomers of (1R,2S,5R)‐Methyl(1‐naphthyl)‐phenylmenthoxysilane of Sommer

Year: 2024

Type: article

Abstract: A highly selective approach with high yields of two diastereomeric silicon‐stereogenic menthoxysilanes, (RSi)‐3 and (SSi)‐3, introduced by Sommer et al., could be established as well as investigated in detail using different analytical tools. Single‐crystal X‐ray diffraction analysis was used to examine the different crystallization rates while Hirshfeld surface analysis was applied to extend supramolecular interactions in the solid state which showed stronger hydrogen bridges for the faster crystallizing diastereomer (SSi)‐3. In addition, similar ground‐state energies haven been found for both diastereomers by DFT calculations. Subsequent NMR studies showed stable Si‐configurations wherein epimerization only started after more than 4 hours at 110 °C. Access to both diastereomers with opposite configuration at the stereogenic silicon center is achievable in high yields and high stereochemical purity using only naturally occurring (−)‐menthol as a reagent.

Source: Zeitschrift für anorganische und allgemeine Chemie

DOI: 10.1002/zaac.202400135

Authors: Jan‐Lukas Kirchhoff, Carsten Strohmann

Institution: TU Dortmund University

Language: English

Topic: Organoboron and organosilicon chemistry

Subfield: Organic Chemistry

Field: Chemistry

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,840

Funders: Deutsche Forschungsgemeinschaft, Konrad-Adenauer-Stiftung, Technische Universität Dortmund