The diester of 2-(1-benzyl-2-methylindol-3-yl)cyclopropane-1,1-dicarboxylic acid undergoes a domino reaction in the presence of titanium(IV) chloride, forming an unusual [3+2] cyclodimer, 1,3-bis(indolyl)cyclopentane.
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The work was performed with financial support from the Russian Scientific Fund (grant 14-13-01178).
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, 2015, 51(10), 936–939
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Ivanova, O.А., Budynina, E.M., Khrustalev, V.N. et al. New domino dimerization of cyclopropylindoles: synthesis of 1,3-bis(indolyl)cyclopentanes. Chem Heterocycl Comp 51, 936–939 (2015). https://doi.org/10.1007/s10593-015-1798-y
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DOI: https://doi.org/10.1007/s10593-015-1798-y