18186-26-0

Upstream product

• 79936-22-4 benzyl 4-O-benzyl-2,3-di-O-methyl-β-L-arabinopyranoside 
• 74-88-4 methyl iodide 
• 79936-15-5 benzyl exo-3,4-O-benzylidene-2-O-methyl-β-L-arabinopyranoside 
• 79936-14-4 benzyl endo-3,4-O-benzylidene-2-O-methyl-β-L-arabinopyranoside 
• 79936-13-3 benzyl exo-3,4-O-benzylidene-β-L-arabinopyranoside 
• 79936-12-2 benzyl endo-3,4-O-benzylidene-β-L-arabinopyranoside 
• 79936-17-7 benzyl 4-O-benzyl-2-O-methyl-β-L-arabinopyranoside 

Downstream Products

• 42720-33-2 N-phenyl-2,3-di-O-methyl-D-xylosylamine 

Relevant academic research and scientific papers

Antibacterial activity of a triterpenoid saponin from the stems of Caesalpinia pulcherrima Linn.

A new compound 1 was isolated from the methanolic extract of the stems of the Caesalpinia pulcherrima Linn. along with a reported compound (2) 3-O-β-D-glucopyranosyl-(1→4)-β-D-xylopyranosyl-(1→3)-α-L-rhamnopyranosyl-(1→2)-α-L-arabinopyranosyl hederagenin 28-O-β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyl ester. The new compound 1 has m.p. 272–274°C, m.f. C46H74O17, [M]+ m/z 898. It was characterised as 3-O-β-D-glucopyranosyl-(1→4)-α-L-arabinopyranosyl hederagenin 28-O-β-D- xylopyranosyl ester by various colour reactions, chemical degradations and spectral analyses. Antibacterial activity of compound 1 was screened against various Gram-positive and Gram-negative bacteria and showed significant results.

CARBOHYDRATE METHYL ESTERS, X. HYDROGENOLYSIS OF BENZYLIDENE ACETALS. SYNTHESIS OF MONO- AND DI-O-METHYL ETHERS OF L-ARABINOSE

Preparation methods of 2-, 3- and 4-mono-O-methyl-, as well as 2,3-, 2,4- and 3,4-di-O-methyl-L-arabinose are described starting from exo and endo benzyl 3,4-O-benzylidene-β-L-arabinopyranoside, respectively. 1H-NMR and GLC data are presented.