Conclusions
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1.
We have shown the feasibility of catalytic activation of CS2 in the reaction with butadiene in the presence of the Pd(acac)2-PPh3-AlEt3 system, 1,2-bis(diphenylphosphino)ethane, and promoters (a mixture of CO2 and NH3), to obtain in single stage substituted 1,4-dithio- and 1,4-di(thioxo)cyclohexanes with high yields.
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2.
We discovered that the heterocyclization of CS2 with butadiene is accompanied by a selective oxidation of the produced tetramethyl-1,4-dithiqcyclohexanes to the corresponding 1,4-bis-sulfoxides with the aid of CO2, under the action of palladium complexes.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 2, pp. 399–403, February, 1989.
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Dzhemilev, U.M., Kunakova, R.V., Fomenko, V.V. et al. Activation of CS2 in reaction with butadiene catalyzed by palladium complexes. Russ Chem Bull 38, 347–350 (1989). https://doi.org/10.1007/BF00953627
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DOI: https://doi.org/10.1007/BF00953627