Microwave-Assisted Syntheses of Thiophene-Based Ionic Liquids: Structural Design and Optimization

María A. Schiel; Claudia E. Domini; Alicia B. Chopa; Gustavo F. Silbestri

doi:10.1055/s-0037-1609934

Synthesis, Table of Contents

Synthesis 2018; 50(24): 4846-4854
DOI: 10.1055/s-0037-1609934

paper

Microwave-Assisted Syntheses of Thiophene-Based Ionic Liquids: Structural Design and Optimization

María A. Schiel

,

Claudia E. Domini*

Instituto de Química del Sur (INQUISUR), Departamento de Química, Universidad Nacional del Sur (UNS)-CONICET, Av. Alem 1253, B8000CPB Bahía Blanca, Argentina Email: cdomini@criba.edu.ar Email: gsilbestri@uns.edu.ar

,

Alicia B. Chopa

,

Gustavo F. Silbestri *

Instituto de Química del Sur (INQUISUR), Departamento de Química, Universidad Nacional del Sur (UNS)-CONICET, Av. Alem 1253, B8000CPB Bahía Blanca, Argentina Email: cdomini@criba.edu.ar Email: gsilbestri@uns.edu.ar

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Abstract

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Abstract

This manuscript explores microwave-assisted reactions for the synthesis of new ionic materials involving the S-alkylation of thiophene. All isolatable products have been fully characterized by NMR and all product have been quantified through UV-vis spectroscopy. By means of a design technique, the experimental protocol (25 min, 200 W, 50 °C) has been optimized, which led us to better yields (96 %). In the absence of MW activation, the conventional thermal reaction at room temperature took longer (24 – 48 h) to obtain similar results.

Keywords

thiophenium salt - ionic liquid - syntheses - microwave - experimental design

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References

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