191470-42-5Relevant articles and documents
Asymmetric synthesis of (+) and (-) trans-2,6-dimethylpiperidines
Freville, Stephanie,Bonin, Martine,Celerier, Jean-Peirre,Husson, Henri-Philippe,Lhommet, Gerard,Quirion, Jean-Charles,Thuy, Vu Moc
, p. 8447 - 8456 (2007/10/03)
(+) aid (-) trans-2,6-dimethylpiperidines 9 have been prepared from diastereomeric lactams 6 and 11, both available from (R)-(-)-phenylglycinol 4. Diastereoselective C-2 alkylation afforded oxazolidines 7 and 12. Reduction of 7 with LiAlH4 or NaBH4 led to trans-2,6-8 with total retention of configuration. When 12 was reduced with NaBH4, trans derivative 13a was isolated as the major isomer. A mechanism is proposed to explain the different results.