ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

New alkoxymethyl-functionalized pyridinium-based chiral ionic liquids: synthesis, characterization and properties

Humaira Yasmeen Gondal, Salma Mumtaz, Ahmed Abbaskhan, Nargis Mumtaz, and Israel Cano

Department of Chemistry, University of Sargodha, Sargodha, Pakistan

E-mail: hygondal@yahoo.com

Received: 19 August 2019  Accepted: 12 March 2020

Abstract:

Abstract

An efficient solvent-free synthesis of a new family of functionalized chiral ionic liquids based on pyridinium cation has been developed from low-cost chiral terpenoid alcohols. An exhaustive characterization was performed using state-of-the-art techniques, such as ESI–MS, ATR FT-IR and NMR (¹H, ¹³C, ¹¹B, ³¹P, ¹⁹F) spectroscopy. Thermal properties of this new class of chiral ionic liquids were studied by TGA and DSC analyses. Catalytic potential of the synthesized CILS was also evaluated in the asymmetric reduction of prochiral acetophenones.

Graphic abstract

Keywords: Alkoxymethyl halides; Chiral ionic liquids; Chiral pool synthesis; Functionalized ionic liquids; Pyridinium-based ionic liquids; Solvent-free synthesis

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-020-01135-z

Chemical Papers 74 (9) 2951–2963 (2020)