METHOD OF SYNTHESIS OF BIS-[ω-(4-HYDROXYPHENYL)ALKYL]-DISULFIDES Russian patent published in 1995 - IPC

FIELD: organic chemistry, substituted disulfides. SUBSTANCE: product: compounds of the general formula where a) R₁=R₂-tert.-butyl, R_3=H H, n 0-3; b) R₁=R₂-tert.-butyl, R₃=CH₃, n 2; c) R₁=R₂=CH₃,, R₃=H, n 2; d) R₁ tert.-butyl, R₂=CH₃, R₃=H, n 2. Process is carried out from ω-(4-hydroxyphenyl)-alkyl chloride and sulfur-containing agent (prepared by reaction of technical sodium sulfide with sulfur in alcohol at boiling) to which parental chloride is added at the molar ratio of parental reagents (1.2-1.3):(1.2-1.3):2, at boiling in solvent medium. Under these conditions the yield of the end products is at the range 78-90% sulfur-containing reagent consumption is decreased from 1.78 to 1.2 mole, stage of additional crystallization is eliminated. Synthesized compounds were used as stabilizing and modifying agents of polymers. EFFECT: increased yield of products, simplified method. 1 tbl