Conclusions
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1.
The product of the oxidation of 5,5,10,10-tetramethyl-4b,5,9b,10-tetrahydroindeno[2,1-a]indene (I) with m.p. 174°, C20H20O2, is 1,2¬5,6-dibenzo-3,3,7,7-tetramethylcyclooctane-4,8-dione (III).
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2.
On the basis of its method of preparation, elementary analysis, and spectroscopic data, the product of the oxidation of compound (I) with m.p. 203–204° has the structural formula (IV).
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8, pp. 1459–1461, August, 1966.
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Lagidze, R.M., Iremadze, N.K., Samsoniya, G.G. et al. The structure of the oxidation products of 5,5,10,10-tetramethyl-4b,5,9b,10-tetra-hydroindeno[2,1-a]indene. Russ Chem Bull 15, 1399–1401 (1966). https://doi.org/10.1007/BF01151383
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DOI: https://doi.org/10.1007/BF01151383