Asymmetric Synthesis of the α-d-Galactosyl Ceramide KRN7000 via an Organocatalytic Aldol Reaction as Key Step
作者:Dieter Enders、Violeta Terteryan、Jiří Paleček
DOI:10.1055/s-0029-1218844
日期:2010.9
The asymmetric synthesis of the antitumor and immunostimulatory α-d-galactosyl ceramideKRN7000 using a (R)-proline-catalyzed enantioselective aldol reaction as key step is described. The title compound is synthesized in thirteen linear steps with excellent stereoselectivity (de >98%, ee = 95%) employing the commercially available substrates 1-pentadecanal, 2,2-dimethyl-1,3-dioxan-5-one, hexacosanoic
A direct organocatalytic entry to sphingoids: asymmetric synthesis of d-arabino- and l-ribo-phytosphingosine
作者:Dieter Enders、Jiří Paleček、Christoph Grondal
DOI:10.1039/b515007h
日期:——
The organocatalytic asymmetric synthesis of D-arabino- and L-ribo-phytosphingosine is described employing a diastereo- and enantioselective (S)-proline-catalyzed aldolreaction of 2,2-dimethyl-1,3-dioxan-5-one and pentadecanal as the key step.