SYNTHESIS OF RESORCINOL VINYL ETHER IN THE MONO-POSITION, INFLUENCE OF THE CATALYST, TEMPERATURE AND SOLVENT ON THE REACTION YIELD

Abstract

Currently, the synthesis of substances containing double and triple bonds solves a number of problems in the industry. But in the process of synthesis of these substances we are faced with some problems. This article discusses the influence of the catalyst and temperature on the synthesis of resorcinol and vinyl acetylene esters containing unsaturated bonds. Alkali metal hydroxides were chosen as a highly alkaline medium. Of the experimental variants, the highest result was observed when performing synthesis in the KOH-DMSO environment. CsF was also used to increase the alkalinity of the medium. The essence of the high basicity property of the KOH-DMSO system is related to the strong solvation of cations and weak anions. It should also be taken into account that KOH is poorly soluble and has a low degree of dissociation in a mixture with dimethyl sulfoxide. This provides a basis for considering the changes that occur with non-dissociated alkali molecules along with the traditional anionic mechanism. Among the catalysts used in the experiment, the most effective was KOH, in which the yield of resorcinol in the mono - position of vinyl ether was 31,7%, and when using LiOH and NaOH – 14,6 and 22,7%, respectively.