Reduction of 5-oxo-4-phenyl-1H-4,5-dihydroindeno[1,2-b]pyridines with triethylsilane in trifluoro-acetic acid gave the corresponding 1,2,3,4-tetrahydroindeno[1,2-b]pyridines predominatly with the trans-configured substituents at atoms C(2), C(3), and C(4). Alkylation of the anionic form of the tetrahydroindenopyridines gives the N- and C(4a)-alkyl derivatives.
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*Dedicated to the memory of Reva S. Sagitullin.
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 1062–1072, July, 2010.
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Stupnikova, S., Petushkova, E., Tanajev, D. et al. Synthesis and alkylation of 4-aryl-5-oxo-1h-2,3,4,5-tetrahydroindeno[1,2-b]pyridines*. Chem Heterocycl Comp 46, 859–867 (2010). https://doi.org/10.1007/s10593-010-0595-x
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DOI: https://doi.org/10.1007/s10593-010-0595-x