Tetrahedron Letters p. 7227 - 7230 (1994)
Update date:2022-08-11
Topics:
Ribeiro, Carlos M. R.
Melo, Sebastiao J. de
Bonin, Martine
Quirion, Jean-Charles
Husson, Henri-Philippe
Key-words: Asymmetric synthesis; spiro-piperidine; 5-azaspiro<3,5> nonane, 6-azaspiro-<4,5> decane. - Abstract: 5-Aza-spiro-<3,5> nonane and 6-aza-spiro-<4,5> decane derivatives 5 and 9 have been prepared from 2-cyano-6-phenyloxazolopiperidine synthon 2b via alkylation followed by cyclisation of the resulting halogeno aminonitrile under dissolving metal conditions.
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