2,4-dihydroxyphenyl 4-methoxyphenyl

Dihydroxyplicnyl 4-Methoxyphenyl Tellurium Dibromide6 0.41 g (I mmol) of 2,4-dihydroxyphenyl 4-methoxyphenyl tellurium dichloride is dissolved in a small volume of ethanol and an excess of 40% hydrobromic acid is added. The mixture is stirred at 20°. The yellow precipitate is filtered off, washed with dilute hydrobromic acid, and dried yield 0.50 g (100%) m.p. 180° (dec from diethyl ether/petroleum ether). 

Diacetoxyphenyl 4-Methoxyphenyl Tellurium Dichlorideb To 0.21 g (0.5 mmol) of 2,4-dihydroxyphenyl 4-methoxyphenyl tellurium dichloride are added 5 ml of acetic anhydride followed by 1 drop of concentrated hydrochloric acid. The mixture is gently shaken until it is homogeneous and is then allowed to stand at 20° for 24 h. The mixture is then cooled in an ice bath, water is added dropwise to the stirred mixture, the precipitated product is filtered off, and recrystallized from benzene/petroleum ether (b.p. 50- 70°) yield 0.22 g (88%) m.p. 167°... 

The resulting solution was filtered through animal charcoal and, after addition of 2 liters of methanol, it was debenzylated by hydrogenation at 60°C over palladinized charcoal as a catalyst. After removal of the catalyst by filtration, the filtrate was concentrated by evaporation, whereupon the hydrochloride of 1-p-methoxyphenyl-2-((3-3, 5 -dihydroxyphenyl-(3-oxo)-ethylamino-propane (MP 244°C) crystaiiized out. For the purpose of demethyiation. 

H p-Hydroxyphenyl (4-hydroxyphenyl) G guaiacyl (4-hydroxy-3-methoxyphenyl) S syringyl (4-hydroxy-3,5-dimethoxyphenyl) C catechol (3,4-dihydroxyphenyl) R SEt ... 

Citrosa 3,5-dihydroxy-4-(3-hydroxy-4-methoxyhydrocinna-moyl)phenyl-2-0-(6-deoxy-a-L-mannopyranosyl)-P-D-gluco-pyranoside 3,5-dihydroxy-4-[3-(3-hydroxy-4-methoxyphenyl) propionyl]phenyl-2-0-(6-deoxy-a-L-mannopyranosyl)-P-D-glucopyranoside E959 neohesperidin DC neohesperidin DHC neohesperidine dihydrochalcone NHDC 1-propanone, l-[4-[[2-0-6-deoxy-a-L-mannopyranosyl)-P-D-glycopyranosyl ]oxy]-2,6-dihydroxyphenyl]-3-(3-hydroxy-4-methoxyphenyl) Sukor. 

Synonyms Bis (2,4-dihydroxyphenyl) methanone and bis (2-hydroxy-4-methoxyphenyl) methanone Classification Organic benzophenone deriv. Definition Mixture of benzophenone-6 and -2 and other tetra-substituted benzophenone materials Uses UV absorber in NC lacquer, fluorescent paint, inks, and for protecting furniture woods, cosmetics, colored liq. toiletries, cleaning agents, isocyanate systems, and butyrate metal lacquers Manuf./Distrib. Celanese http //www. celanesechemicals. com http //www.chemvip.com EM Ind. 

H-1 -Benzopyran-4-one, 7-[[6-0-(6-deoxy-a-L-mannopyranosyl)-P-D-glucopyranosyl] oxy]-2,3-dihydro-5-hydroxy-2-(3-hydroxy-4-methoxyphenyl)-, (S)-. See Hesperidin 4H-1-Benzopyran-4-one, 3-[[6-0-(6-deoxy-a-L-mannopyranosyl)-p-D-glucopyranosyl]oxy]-2-(3,4-dihydroxyphenyl)-5,7-dihydroxy-. See Rutin... 

Bis (2,4-dihydroxyphenyl) methanone and bis (2-hydroxy-4-methoxyphenyl) methanone. See Benzophenone-11 Bis (diisobutylaluminum) oxide CAS 998-00-5 EINECS/ELINCS 213-646-5 Synonyms DIBAL-O Tetraisobutyidialuminoxane Classification Organometallic compd. 

Allolicoisoflavone A, T-20089 Demethoxy-7-O-prenylcapillarisin, in T-20161 l-(3,4-Dihydroxyphenyl)-7-(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione, in B-30042... 

Updated Entry replacing A-02947 l- 2,4-Dihydroxyphenyl)-2- 4-methoxyphenyl)-l-propanone, 9CI... 

Me ether [500-65-2]. l- 3,5-Dihydroxyphenyl)-2- 3-hydroxy-4-methoxyphenyl)ethylene. 3,3, 5-Trihydroxy-4 -methoxystilbene. Rhapontigenin, Pontigenin C15H14O4 M 258.273... 

Me ether [34000-39-0]. l-(2,4-Dihydroxyphenyl)-3-(4-hydroxy-3-methoxyphenyl)-2-propen-l-one, 9CL 2, 4,4 -Trihydroxy-3-methoxychalcone. Homobutein C16H14O5 M 286.284... 

CisHjjOe M 288.256 3 -Me ether [6542-59-2]. l-(2,4-Dihydroxy-3-methoxyphenyl)-3 (3,4 dihydroxyphenyl)-2-propen-l-one. 2, 3,4,4 - Tetrahydroxy-3 -methoxychalcone. Lanceoletin Ci HiA M 302.283 Rare chalcone present in floral tissues of some Compositae. 

Cyclisation of some unsymmetrically substituted 2,6-dihydroxyphenyl ketones with ethyl oxalyl chloride gives isomeric chromones, as, for example, compounds (19) and (20) from the ketone (18). The product whidi was originally believed [91] to be the 6-methyl isomer (20) was later shown [92, 93] to be a mixture of chromones (19) and (20). Some unsymmetrical ketones behave similarly [74,94] but others react to give one isomer only for example, 2,4,6-trihydroxy-3-methoxyphenyl 4-hydroxybenzyl ketone (21) cyclises with ethyl oxalyl chloride to give the 8-methoxychromone (22) [65] whose structure has bwn confirmed [95] by an independent synthesis. 

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