Asymmetric synthesis of (2S,3S)-3-hydroxy-2-phenylpiperidine via ring expansion
β Scribed by Jaemoon Lee; Thoa Hoang; Stephanie Lewis; Steven A Weissman; David Askin; R.P Volante; P.J Reider
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- French
- Weight
- 71 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
β¦ Synopsis
A catalytic highly enantioselective (99% ee) preparation of N-tert-butyloxycarbonyl-(2S,3S)-3-hydroxy-2-phenyl-piperidine and N-tert-butyloxycarbonyl-(2S)-2-phenyl-piperidin-3-one was developed using an intramolecular epoxide opening followed by ring expansion. The cis-epoxide starting material was available in high ee via Jacobsen epoxidation.
π SIMILAR VOLUMES
2S)-N-Boc-3-oxo-2-phenylpiperidine 5 and (2S,3S)-N-Boc-3-hydroxy-2-phenylpiperidine 6, known chiral building blocks for the synthesis of non-peptidic substance P antagonists, were prepared from erythro (2S)-N-benzyl 2-hydroxybenzylpyrrolidine derived from (S)-N-methoxy-N-methylpyroglutamide.
The synthesis of 3-prolinomethionine can be easily achieved in a diastereoselective and enantioselective way via zinc-enolate cyclisation. After transmetallation by CuCN.2LiCI, the zinc--copper derivative was reacted with S-methyl methanesulfonothioate leading in a "one-pot" procedure, to N-(0t-meth
A synthetic route to (2S,3S)-3-hydroxypipecolic acid was achieved from readily available nonchiral pool starting material cis-2-butene-1,4-diol and involved Claisen orthoester rearrangement, Sharpless asymmetric dihydroxylation and intramolecular lactamisation of azido lactone as the key steps.