3.4.5- Trihydroxy benzophenone

For resists designed for applications in the near-UV region, good absorption at 365 nm (i-line) and at 405 nm and 436 nra (g-line) is required, and aromatic substituents present the best option. The most commonly used ballast compound is polyhydroxybenzophenone, where one to three (or even four) hydroxyl groups can be esterified with diazoquinone sulfonyl-chloride, as discussed above. A popularly used dissolution inhibitor is a substituted 2,3,4-trihydroxy benzophenone of stmcture (in), " where DQ stands here for diazonaphthoquinone. One other popular diazoquinone derivative found in commercial resists is the sulfonyl ester of cumylphenol. Similar materials such as shown in structure (IV) have also been employed in resist applications. ... 

Also obtained by reaction of methyl iodide with monosodium salt of 2,3, 4-trihydroxy-benzophenone at 120° for several hours [344]. 

LiChrosorb RP-8 UV280 nm MeOH/10 mM Phosphate buffer (40/60) Benzoic acid, Pyrogallol, Trihydroxy -benzophenone 37... 

Geranyl-2,4,6-trihydrOxy-benzophenone (phenolic ketone) Tovomita krukovii (Clusiaceae) Candida albicans secreted aspartic protease (109 pM) [36]... 

Preparation by reaction of butyl bromide with 2,4,4 -trihydroxy-benzophenone in the presence of potassium carbonate (50%) [380]. 

Obtained (trace) by reaction of 2-methyl-3-bnten-2-ol with 2,4, 6-trihydroxy-benzophenone in the presence of boron triflnoride-etherate in dioxane at 25-30° (<1%) [373],... 

Preparation by alkylation of 2,2, 4-trihydroxy-benzophenone with 2,2,4-trimelhylpaitene in benzene in the presoice of concentrated sulfuric acid [835]. 

Also obtained by treahnent of 2,4,6-trihydroxy-benzophenone with prenyl di-n-cyclohexyl-sulfonium tetrafluoroborate salt (1 equiv) in the presence of Hiinig s base (1.1 equiv) in methylene chloride at r.t. for 7 h (10%) [1536]. 

Wood Garciniaxanthone D and 1,4,5-trihydroxyxanthone (Minami et al, 1995). 2,5-Dihydroxy-l-methoxyl xanthone, l-o-methylsympho-xanthone, Garciniaxanthone E, symphoxanthone and subelliptenone A (Minami et al, 1996). A new benzophenone derivative, 2, 3, 6-trihydroxy-2,4-dimethoxy-benzo-phenone and a new xanthone, 1,6-0-... 

Cydisierung erfolgt bei Bestrahlung von 2,3, 4, 6-Tetrahydroxy-benzophenon in Athanol zu 9-Oxo-2,3,8-trihydroxy-xanthen2 ... 

Dihydroxyphenyl)(2,4,6-trihydroxyphenyl)methan-one. Benzophenone, 2,3, 4,4, pentahydroxy- C.l. 75240 C.l. Natural Yellow 11 (3,4-Dihydroxyphenyl)(2,4,6-trihydroxyphenyl)methanone EINECS 208-268-2 Fustic extract Kino-yellow Laguncurin Maclurin Maklurin Methanone, (3.4-dihydroxyphenyl)(2,4,6-trihydroxy-phenyl)- Morintannic acid Moritannic acid NSC 83240 Patent Fustin 2,3, 4,4,6-Pentahydroxybenzophenone. Used to dye fabrics. Crystals mp = 222-223° soluble in H2O (0.48 gtlOO ml), more soluble in organic solvents. 

Benzophenone-3,3 -4,4 -tetracarboxylic dianhydride. See 3,3, 4,4 -Benzophenone tetracarboxylic di an hydride Benzophenone, 2,3,4-trihydroxy-. See 2,3,4-T ri hydroxybenzophenone Benzophenone, 2,4,6-trimethyl-. See 2,4,6-Tri methyl benzophenone Benzo a phenoxazin-7-ium, 9-(dimethylamino)-, chloride Benzo a phenoxazin-9-ylidene-dimethyl-ammonium, chloride. See Basic blue 6... 

Obtained by ditosylation of 2,4,6-trihydroxy-3,5-diprenyl-benzophenone with p-toluene-sulfonyl chloride in the presence of potassium carbonate in refluxing acetone for 8 h (39%) [373]. 

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