94425-94-2

Upstream product

• 94356-29-3 desoxyrhaponticin 6''-O-gallate 
• 197440-96-3 (E)-5-hydroxy-4'-methoxy-3-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyloxy)stilbene 
• 3462-97-3 (4-methoxybenzyl)triphenylphosphonium bromide 
• 21960-26-9 (4-methoxybenzylidene)triphenylphosphorane 
• 197440-94-1 Acetic acid (2S,3R,4S,5R,6R)-4,5-diacetoxy-6-acetoxymethyl-2-{3-hydroxy-5-[(Z)-2-(4-methoxy-phenyl)-vinyl]-phenoxy}-tetrahydro-pyran-3-yl ester 
• 30197-14-9 (E)-3-(β-D-glucopyranosyloxy)-5-hydroxy-4'-methoxystilbene 
• 572-09-8 2,3,4,6-tetra-O-acetyl-α-D-glucopyranosyl bromide 
• 824-94-2 p-methoxybenzyl chloride 
• 187803-40-3 3,5-bis(tert-butyldimethylsilyloxy)benzaldehyde 
• 65728-21-4 5-[(E)-2-(4-methoxyphenyl)vinyl]benzene-1,3-diol 
• 26153-38-8 3,5-dihydroxybenzaldehyde 

Downstream Products

• 27208-80-6 polydatin 
• 148766-36-3 cis-piceid 

Relevant academic research and scientific papers

USE OF HYDROXYSTILBENES FOR DYEING, READY-TO-USE COMPOSITION CONTAINING THEM AND DYEING PROCESS

The invention relates to the use of hydroxystilbenes for dyeing, to ready-to-use dye compositions comprising them, to a dyeing process using them and to a multi-compartment device containing the compositions used in the processes of the invention.

Synthesis of biologically active polyphenolic glycosides (combretastatin and resveratrol series)

(E)-3-(β-D-Glucopyranosyloxy)-4',5-dihydroxystilbene (resveratrol 3-β-D-glucoside, piceid), (Z)-2',3'-dihydroxy-3,4,4',5-tetramethoxystilbene (combretastatin A-1), (Z)-3'-hydroxy-3,4,4', 5-tetramethoxystilbene (combretastatin A-4), (Z)-2'-hydroxy-3,4,4',5-tetramethoxystilbene (combretastatin iso-A-4), α,β-dihydro-2',3'-dihydroxy-3,4,4',5-tetramethoxystilbene (combretastatin B-1), the corresponding glucosides, and related compounds have been synthesized via Wittig reactions followed by,glucosylation under phase-transfer catalysis. Most of the compounds synthesized have been tested with respect to biological activity (cytostatic, cytotoxic, antimitotic, neurotoxic, antiplatelet aggregation activity).

Isolation, synthesis, and antiplatelet aggregation activity of resveratrol 3-O-β-D-glucopyranoside and related compounds

Resveratrol 3-O-β-D-glucopyranoside (1) has been isolated from the seeds of Erythrophleum lasianthum (Caesalpinioidae, Leguminosae), a South African plant used in traditional medicine, and has shown antiplatelet aggregation activity. The synthesis of 1, related hydroxystilbenes, and their glucosides has been undertaken to provide larger quantities, for further biological evaluation, and has been accomplished via Wittig reactions followed by glucosylation under phase transfer catalysis.

Studies on Rhubarb (Rhei Rhizoma). VI. Isolation and Characterization of Stilbenes

Nineteen stilbene derivatives (I-XIX), of which five are novel cis-stilbenes, have been obtained from a rhubarb of low quality (commercial name:, Imo-Daio).Based on chemical and spectroscopic evidence, these compounds have been characterized as rhapontigenin (I), rhaponticin (II), rhapontigenin 3'-O-β-D-glucopyranoside (III), rhaponticin 6''-O-gallate (IV), rhaponticin 2''-O-gallate (V), rhaponticin 2''-O-p-coumarate (VI), piceatannol (VII), piceatannol 3-O-β-D-glucopyranoside (VIII), piceatannol 3'-O-β-D-glucopyranoside (IX), piceatannol 3'-O-β-D-xylopyranoside (X), piceatannol 3-O-β-D-(6''-O-galloyl) glucopyranoside (XI), desoxyrhaponticin (XII), desoxyrhaponticin 6''-O-gallate (XIII), 3,4',5-trihydroxystilbene 4'-O-β-D-(6''-O-galloyl) glucopyranoside (XIV), cis-3,3',5-trihydroxy-4'-methoxystilbene 3-O-β-D-glucopyranoside (XV), cis-3,3',5-trihydroxy-4'-methoxystilbene 3-O-β-D-(6''-O-galloyl) glucopyranoside (XVI), cis-3,5-dihydroxy-4'-methoxystilbene 3-O-β-D-glucopyranoside (XVII), cis-3,3',5-trihydroxy-4'-methoxystilbene 3-O-β-D-(2''-O-galloyl) glucopyranoside (XVIII) and cis-3,3',5-trihydroxy-4'-methoxystilbene (XIX).Keywords - rhubarb; Polygonaceae; trans-stilbene; cis-stilbene; gallic acid ester; p-coumaric acid ester; rhaponticin; desoxyrhaponticin; piceatannol; 3,4',5-trihydroxystilbene