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2 109 740

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IPC

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Application

93038295/04, 1993-07-16

(22)

Actual filing date

1993-07-16

(45)

Published

1998-04-27

(72)

Inventor

Dzhemilev U.M.Ibragimov A.G.Azhgaliev M.N.Muslukhov R.R.

(73)

Holder

Institut Neftekhimii I Kataliza An Respubliki Bashkortostan

METHOD FOR PRODUCING TRANS-3,4- DI(SUBSTITUTED)TETRAHYDROTHIO-PHENES Russian patent published in 1998 - IPC

Abstract RU 2109740 C1

FIELD: chemical industry. SUBSTANCE: present invention describes rubber vulcanization accelerators and addition agents to lubricating oils and fuels. Trans-3,4-dialkyl (aryl, alkenyl) tetrahydrothiophenes are prepared by reacting alkyl benzene, 4-vinyl cyclohex-1- ene with dialkylaluminium chloride of formula: R12

AlCl wherein R′ is Et, i-Bu and metallic magnesium in the presence of ZrCl4 at room temperature under argon atmosphere in tetrahydrofuran and subsequently adding elemental sulfur in three-fold excess amount with respect to organoaluminium compounds and maintaining reaction mixture at 80 C. Yield is no higher than 86%. EFFECT: more efficient preparation method. 1 tbl

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RU 2 109 740 C1

Authors

Dzhemilev U.M.

Ibragimov A.G.

Azhgaliev M.N.

Muslukhov R.R.

Dates

1998-04-27—Published

1993-07-16—Filed

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