METHOD OF SYNTHESIS OF 1,1-DICHLORO-4-METHYLPENTADIENE-1,4 Russian patent published in 1995 - IPC

FIELD: organic chemistry. SUBSTANCE: the end product is synthesized by electric reduction of 1,1,1-trichloro-2-hydroxy-4-methylpentene-4. Electrolysis is carried out using two-phase catholyte containing 63.4-30.2% water and 19.25-37.2% isopropanol. Then organic part of emulsion is separated, isopropanol is extracted with water and distilled off preparing the end product at analytical pure form. Aqueous layer of electrolyzed reaction mixture and aqueous phase after organic layer extraction were processed involving extraction of parental reagent and running mixture solutions formed after all extractions of aqueous-isopropanol solutions. Commodity hydrochloric acid (20% ) and water were isolated which is recovered on the stage of isopropanol extraction from organic layer. EFFECT: increased yield of the end product, simplified process, decreased energy consumption, excluded sewage formation at isolation of 1,1-dichloro-4-methylpentadiene-1,4, regeneration of parental catholyte and anolyte. 1 tbl