Asymmetric synthesis of N,O,O,O-tetra-acetyl d-lyxo-phytosphingosine, jaspine B (pachastrissamine) and its C(2)-epimer
作者:Elin Abraham、José I. Candela-Lena、Stephen G. Davies、Matthew Georgiou、Rebecca L. Nicholson、Paul M. Roberts、Angela J. Russell、Elena M. Sánchez-Fernández、Andrew D. Smith、James E. Thomson
DOI:10.1016/j.tetasy.2007.10.026
日期:2007.10
The highly diastereoselective conjugate addition of lithium (S)-N-benzyl-N-(α-methylbenzyl)amide to a γ-silyloxy-α,β-unsaturated ester and in situ enolate oxidation with (+)-(camphorsulfonyl)oxaziridine has been used as the key step in the asymmetric synthesis of N,O,O,O-tetra-acetyl d-lyxo-phytosphingosine, jaspine B (pachastrissamine) and its C(2)-epimer.
(S)-N-苄基-N-(α-甲基苄基)酰胺锂的高非对映选择性共轭加成至γ-甲硅烷氧基-α,β-不饱和酯并用(+)-(樟脑磺酰基)恶唑烷原位烯醇氧化被用作不对称合成中的关键步骤ñ,ø,ö,ö四-乙酰D-来苏-phytosphingosine,jaspine B(pachastrissamine)及其C(2)差向异构体。