METHOD FOR PREPARING ASYMMETRIC DIALKYL- DISULFIDES Russian patent published in 2004 - IPC

Abstract RU 2223265 C1

FIELD: organic chemistry, chemical technology. SUBSTANCE: invention relates to method for preparing asymmetric dialkyldisulfides of the general formula (I): R¹-S-S-R² (I) wherein R¹ is CH₃,C₂H₅,h-C₄H₉; R² is h-C₆H₁₃,h-C₈H₁₇,h-C₉H₁₉. Indicated dialkyldisulfides are prepared by interaction of isopropyl alcohol, sodium hydroxide (NaOH), alkylmercaptans of the general formula R²SH wherein R² is h-C₆H₁₃,h-C₈H₁₇,h-C₉H₁₉ and halide alkyls of the general formula R¹X wherein R¹ is CH₃,C₂H₅,h-C₄H₉ in the presence of elemental sulfur (S₈) at temperature 75-85 C. Process is carried out in the presence of catalyst 1-(N,N-dimethylaminomethyl)- 1,2,4-triazole taken in the mole ratio R²SH : R¹X : :S₈ NaOH : 1-(N,N-dimethylaminomethyl)-1,2,4-triazole = 10 : (10-11) : (10-11) : (10-11) : (0.2-0.3), respectively, for 2.5-3.5 h. EFFECT: elevated yield of end products, reduced synthesis time. 1 cl, 1 tbl, 1 ex

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RU 2 223 265 C1

Authors

Kirichenko G.N.

Dzhemilev U.M.

Glazunova V.I.

Khanov V.Kh.

Kirichenko V.Ju.

Dates

2004-02-10—Published

2002-07-08—Filed