Conclusions
We synthesized 1,4-di-tert-butyl- and 1-tert-butyl-4-isopropylpiperid-3-ones and studied the stereochemistry of their reduction. With the increase in the size of the substituent at C2, there is increasing obstruction to the attack of the reagent at the carbonyl from the axial region.
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G. T. Katvalyan and E. A. Mistryukov, Izv. Akad. Nauk SSSR, Ser. Khim., 576 (1979).
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 10, pp. 2328–2331, October, 1985.
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Katvalyan, G.T., Mistryukov, É.A. Stereochemistry of the reduction of the carbonyl function of 3-ketopiperidines: Influence of a bulky e-substituent at C4 . Russ Chem Bull 34, 2156–2159 (1985). https://doi.org/10.1007/BF00963253
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DOI: https://doi.org/10.1007/BF00963253