Asymmetric synthesis of N,O,O,O-tetra-acetyl d-lyxo-phytosphingosine, jaspine B (pachastrissamine), 2-epi-jaspine B, and deoxoprosophylline via lithium amide conjugate addition
作者:Elin Abraham、E. Anne Brock、José I. Candela-Lena、Stephen G. Davies、Matthew Georgiou、Rebecca L. Nicholson、James H. Perkins、Paul M. Roberts、Angela J. Russell、Elena M. Sánchez-Fernández、Philip M. Scott、Andrew D. Smith、James E. Thomson
DOI:10.1039/b801671b
日期:——
The highly diastereoselective anti-aminohydroxylation of (E)-gamma-tri-iso-propylsilyloxy-alpha,beta-unsaturated esters, via conjugate addition of lithium (S)-N-benzyl-N-(alpha-methylbenzyl)amide and subsequent in situ enolate oxidation with (+)-(camphorsulfonyl)oxaziridine, has been used as the key step in the asymmetricsynthesis of N,O,O,O-tetra-acetyl d-lyxo-phytosphingosine (20% yield over 7 steps)