Conclusions
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1.
p-Bis(tert-butylsulfonyl)benzene (I) and 2,5-bis(tert-butylsulfonyl)thiophene (II) when treated with n-BuLi are capable of replacing one of the sulfonyl groups by the n-butyl group.
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2.
The conditions were found where sulfone (II) is metalated in theβ position of the thiophene ring.
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3.
Lithium 2-thienyimercaptide is metalated in the freeα position.
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See [1] for Communication 7.
Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 7, pp. 1583–1588, July, 1976.
The authors are indebted to A. S. Yakubov for supplying the sample of 2, 4-dibenzoylthiophene.
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Stoyanovich, F.M., Chermanova, G.B., Gol'dfarb, Y.L. et al. Reaction of aromatic sulfonyl compounds with excess organolithium reagent. Russ Chem Bull 25, 1503–1508 (1976). https://doi.org/10.1007/BF00920826
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DOI: https://doi.org/10.1007/BF00920826