ChemInform Abstract: One‐Pot Three‐Component Synthesis of Hantzsch 1,4‐Dihydropyridines Promoted by Dimethyl Phosphate Ionic Liquids.

Abstract

An unprecedented, convenient synthesis of a variety of 1,4‐dihydropyridine derivatives is described using ionic ligands possessing a (Me‐O)2PO2‐ counterion as promoter.

Ionic liquids and their modification with lithium salts –synthesis and studies

“…The first, which has been known for more than thirty years, requires alkylation of 1-substituted imidazoles by trialkyl phosphates, mainly by trimethyl phosphate (route A, Fig. 3.1) [17][18][19][20][21][22][23][24][25]. This is the method for preparation of different 1-alkyl-3-methylimidazolium dimethyl phosphates (2).…”

“…Like other ILs, IA-DMPs most frequently are used as reaction media or/and catalysts in organic synthesis. This field of application has lately been also quite extensively investigated at the University of Latvia [19][20][21][22][23][24][25][26]. The use of IA-DMP in other research areas (electrochemistry, extraction processes, formation of composite materials, etc.)…”