Synthesis of β-<i>CF</i><sub>2</sub>-<scp>d</scp>-Mannopyranosides and β-<i>CF</i><sub>2</sub>-<scp>d</scp>-Galactopyranosides by Reformatsky Addition onto 5-Ketohexoses
The first synthesis of β-CF 2 -d-manno- and β-CF 2 -d-galactopyranosylesters 1a and 1b is reported. It involves an oxidation-Reformatsky addition sequence on carbohydrate-derived diols and a dehydroxylation of the resulting cyclized compounds. The expected β-CF 2 -d-glycoside and an undesired β-CF 2 -l-glycoside are obtained from this sequence. An application of this methodology to the synthesis of some fluorinated pseudo-glycopeptides, potential selectin inhibitors, is also described.
Intramolecular Tishchenko Reactions of Protected Hexos-5-uloses: a Novel and Efficient Synthesis of l-Idose and l-Altrose
作者:M. Adinolfi、G. Barone、F. De Lorenzo、A. Iadonisi
DOI:10.1055/s-1999-3156
日期:1999.3
Protected t-butyl esters of aldonic acids with the rare L-ido and L-altro configuration can be effectively obtained by a diastereoselective Tishchenko reaction of hexos-5-uloses induced by t-BuOSmI2. These compounds can be easily converted into the corresponding protected lactones and free sugars.
[EN] SYNTHESIS OF AN AZASUGAR AND INTERMEDIATES THEREOF<br/>[FR] SYNTHÈSE D'UN AZASUCRE ET DE SES INTERMÉDIAIRES
申请人:DIPHARMA FRANCIS SRL
公开号:WO2019020362A1
公开(公告)日:2019-01-31
The present invention relates to a process for the preparation of migalastat of formula (I) and intermediates useful in the synthesis thereof. The process comprises the double reductive amination reaction of a compound of formula (VI).