Synthesis of new ionic liquids based on (5Z,9Z)-alkadienoic acids and choline

Efficient synthesis of ionic liquids based on stereoisomerically pure natural and synthetic higher (5Z,9Z)-alkadienoic acids and choline hydroxide was developed. The key unsaturated carboxylic acids were prepared using the stereoselective cross-cyclomagnesiation reaction of aliphatic and oxygen -containing 1,2-dienes with EtMgBr in the presence of Mg metal and Cp2TiCl2 catalyst.