(2R,3S,4S)-4-amino-2-tetradecyltetrahydrofuran-3-ol hydrochloride;2-epi-jaspine B hydrochloride;(2R,3S,4S)-2-tetradecyl-4-amino-tetrahydrofuran-3-ol hydrochloride;(2R,3S,4S)-4-amino-2-tetradecyloxolan-3-ol;hydrochloride
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)
whose coupling with a lipophilic segment under Wittig conditions, followed by deprotection and a THF core construction, completed the convergent synthesis of 2-epimer of 1. The final anhydrophytosphingosine 4.HCl was screened for its antiproliferative/cytotoxic activity employing multiple human cancer cell lines. In vitro evaluation revealed that 2-epi-jaspine B exhibited significant antitumour growth
Asymmetric synthesis of Pachastrissamine (Jaspine B) and its diastereomers viaη3-allylpalladium intermediates
作者:Mikko Passiniemi、Ari M. P. Koskinen
DOI:10.1039/c0ob00643b
日期:——
A short route for the synthesis of Pachastrissamine (Jaspine B), an anhydrosphingosine derivative, and all three of its diastereomers is presented. The route consists of only 9 steps from the commercially available Garner's aldehyde. The furan framework is formed via an η3-allylpalladium intermediate.