Rapid Access to 1,6-Anhydro-β-<scp>l</scp>-hexopyranose Derivatives via Domino Reaction: Synthesis of <scp>l</scp>-Allose and <scp>l</scp>-Glucose
作者:Daniele D’Alonzo、Annalisa Guaragna、Carmela Napolitano、Giovanni Palumbo
DOI:10.1021/jo800775v
日期:2008.7.1
An expeditious and efficient synthesis of 1,6-anhydro-beta-L-hexopyranosyl derivatives 3 as valuable building blocks for the preparation Of L-sugars is herein reported. This route relies upon the use of a domino reaction involving five synthetic steps from the 5,6-dihydro-1,4-dithiin 4. As 1,6-anhydro derivatives 3 are obtained, dithioethylene bridge removal and double-bond dihydroxylation give access to protected L-allose and L-glucose in stereoselective fashion and high yields.