Abstract
The corresponding 5-substituted compounds are formed in the halogenation, nitration, and diazo coupling of 1,3,3-trimethyl-6′-nitroindoline-2-spiro-2′-[2H]chromene.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1065–1068, August, 1977.
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Samoilova, N.P., Gal'bershtam, M.A. Some substitution reactions in a number of photochromic indolinespirochromenes. Chem Heterocycl Compd 13, 855–858 (1977). https://doi.org/10.1007/BF00488909
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DOI: https://doi.org/10.1007/BF00488909