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3- Hydroxy-2-methylanthraquinone

A-Dihydroxy-2-hydroxy-methylanthraquinone (XI) Quinizarin-2-carboxylic acid (XII)... [Pg.196]

O 25.17%, golden yel pltlts (from ale, benz or petr eth), mp 194-96°, bp-sublimes explodes can be prepd by diazotizing 5-amino-4-hydroxy-2-methy Ian thraquinone in coned H2SO4 and warming the soln to 120° or by heating 4-hydroxy-5-methoxy-2-methylanthraquinone with acetic acid aq HBr and by many other methods listed in Beil (Ref 1)... [Pg.203]

In rare instances, 3-L-rhamnosyl derivatives of anthocyanidins occur in plant tissues.Frangulin (franguloside), an L-rhamnoside of 4,5,7-tri-hydroxy-2-methylanthraquinone, is found in Rhamrms spp. it probably has the glycosyloxy group at C-7. [Pg.386]

Intact plants and cell cultures of Streptocarpus dunnii (Gesneriaceae) contain several 1,2-naphthoquinones with a reversed prenyl side chain, such as that in dunnione (66) (Fig. 6.16), l-Hydroxy-2-methylanthraquinone (67) and 1-hydroxy-2-(hydroxymethyl)anthraquinone (68) were also isolated from this culture. Administration of [1-carboxy- C]<9-succinylbenzoate revealed that was incorporated into the 1-position of dunnione and the 10-position of anthraquinones. These results, together with those of feeding experiments in which lawsone (41) and its 2-prenyl ether (69) were applied, suggested that dunnione (66) was formed by a Claisen-type rearrangement at the 2-position of 2-carboxy-4-oxotetralone (COT) (43), whereas anthraquinones were formed by prenylation at the 2-position of 2-carboxy-4-oxo-tetralone (COT) (43) or l,4-dihydroxy-2-naphthoic acid (40) (Inouye and Leistner, 1988). [Pg.87]

Hydroxy-3,8-dimethoxy-2-methylanthraquinone, in T-10161 1 -Hydroxy-5,6-dimethoxy-2-methylanthraquinone, in T-10160 7-Hydroxy-2,8-dimethoxy-1 -methyl-4-aza-9-fluorenone, in T-30198 7-Hydroxy-3,4-dimethoxy-5-methylbenzo[/z] quinolin-2(l/7)-one, see A-10131 7-Hydroxy-2,9-dimethoxy-4-methyl-6//-dibenzo[, f/]pyran-6-one, see S-10001... [Pg.466]

Fig. 6. Biosynthesis of l-hydroxy-2-methylanthraquinone (XVII) and related naphthalene derivatives in Catalpa (Bignoniaceae). Fig. 6. Biosynthesis of l-hydroxy-2-methylanthraquinone (XVII) and related naphthalene derivatives in Catalpa (Bignoniaceae).
Dimethoxy-4-hydroxy-2-methylanthraquinone (6,8-dimethoxy-l-hydroxy-3-methyl-... [Pg.105]

See other pages where 3- Hydroxy-2-methylanthraquinone is mentioned: [Pg.442]    [Pg.871]    [Pg.945]    [Pg.676]    [Pg.111]    [Pg.131]    [Pg.132]    [Pg.134]    [Pg.135]    [Pg.136]    [Pg.136]    [Pg.137]    [Pg.139]    [Pg.140]    [Pg.140]    [Pg.140]    [Pg.141]    [Pg.142]    [Pg.85]    [Pg.186]    [Pg.187]    [Pg.173]    [Pg.733]    [Pg.187]    [Pg.200]    [Pg.442]    [Pg.871]    [Pg.945]    [Pg.733]    [Pg.130]    [Pg.390]    [Pg.661]    [Pg.676]    [Pg.169]    [Pg.543]    [Pg.543]    [Pg.291]    [Pg.292]    [Pg.644]    [Pg.644]    [Pg.180]    [Pg.13]    [Pg.454]    [Pg.226]    [Pg.645]    [Pg.645]    [Pg.132]    [Pg.110]    [Pg.111]    [Pg.112]    [Pg.131]    [Pg.132]    [Pg.132]    [Pg.133]    [Pg.133]    [Pg.133]    [Pg.134]   
See also in sourсe #XX -- [ Pg.169 ]

See also in sourсe #XX -- [ Pg.111 , Pg.131 , Pg.132 , Pg.135 , Pg.136 , Pg.137 , Pg.139 , Pg.140 , Pg.141 , Pg.142 ]



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L-Hydroxy-2-methylanthraquinone

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