94356-30-6

Upstream product

• 94356-23-7 rhaponticin 6-gallate 
• 94356-24-8 rhaponticin 2-gallate 
• 94356-25-9 rhaponticin 2''-O-p-coumarate 
• 155-58-8 rhaponticin 
• 621-58-9 3-hydroxy-4-methoxystyrene 
• 709030-16-0 (3-hydroxy-5-iodophenyl) 2,3,4,6-tetra-O-acetyl-β-D-glucopyranoside 
• 604-68-2 α-D-glucopyranose peracetylate 
• 10272-07-8 3.5-dimethoxyaniline 
• 25245-27-6 1-iodo-3,5-dimethoxybenzene 
• 621-59-0 isovanillin 
• 124530-57-0 Rhaponticin 6''-O-(E)-p-coumarate 

Downstream Products

• 266997-55-1 (2S,3R,4S,5R,6R)-2-{3-[(E)-2-(3,4-Dimethoxy-phenyl)-vinyl]-5-methoxy-phenoxy}-3,4,5-trimethoxy-6-methoxymethyl-tetrahydro-pyran 
• 1093135-92-2 C₄₇H₆₇NO₂₉ 
• 113042-92-5 Acetic acid (2R,3S,4R,5S,6S)-3,5-diacetoxy-2-{3-acetoxy-5-[(E)-2-(3-acetoxy-4-methoxy-phenyl)-vinyl]-phenoxy}-6-acetoxymethyl-tetrahydro-pyran-4-yl ester 
• 1403836-09-8 rhaponticin 
• 500-65-2 rhapontigenin 
• 113042-92-5 (E)-3,3'-diacetoxy-4'-methoxy-5-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyloxy)stilbene 

Relevant academic research and scientific papers

A short synthesis of rhaponticin and its 3''-fluoroanalog via a wittig/heck-mizoroki route

Rhaponticin and its 3''-fluoroanalog have been prepared from easily accessible starting materials. The key step of these syntheses is the silver carbonate-mediated glycosidation reaction employed for the selective formation of a β -glycosidic bond. A palladium acetate-catalyzed Heck-Mizoroki reaction in triethanolamine established an (E) configuration in the stilbene with simultaneous deprotection of the carbohydrate.

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.

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