L-tartaric acid is a quite useful four-carbon building block for monosaccharide synthesis. The versatility can be reinforced by the coupled use of stereoselective addition reactions where the suitable choice of organometallics leads to highly anti-selective additions. The building block is particularly useful in the synthesis of rare sugars the versatility of which is demonstrated by the synthesis of some
STEREOSELECTIVE SYNTHESIS OF L-SUGARS OF BIOLOGICAL IMPORTANCE STARTING FROM 4-<i>O</i>-BENZYL-2,3-<i>O</i>-ISOPROPYLIDENE-L-THREOSE AS A CHIRAL BUILDING BLOCK
作者:Teruaki Mukaiyama、Tohru Yamada、Keisuke Suzuki
DOI:10.1246/cl.1983.5
日期:1983.1.5
Biologically important l-sugars 2-deoxy-l-galactose, 3-amino-2,3-dideoxy-l-xylo-hexose, and l-diginose were successfully synthesized from the homoallyl alcohol, prepared by the stereoselective addition of allylic Sn(IV) reagent to 4-O-benzyl-2,3-O-isopropylidene-l-threose.
Arylamines undergo smooth cyclization with 2-deoxy-d-ribose on the surface of montmorillonite KSF clay under mild conditions to afford the corresponding sugar-derived chiral tetrahydroquinolines in high yields with moderate diastereoselectivity. The assignment of the stereochemistry of the product was achieved by various NMR studies.