Phthalic anhydride: 1,3-Isobenzofurandione

Indenopyrene, see Indeno[l,2,3-crf pyrene l//-Indole, see Indole Indolene, see Indoline Inexit, see Lindane Inhibisol, see 1,1,1-Trichloroethane Insecticide 497, see Dieldrin Insecticide 4049, see Malathion Insectophene, see a-Endosulfan, p-Endosulfan Intox 8, see Chlordane Inverton 245, see 2,4,5-T lodomethane, see Methyl iodide IP, see Indeno[l,2,3-crf pyrene IP3, see Isoamyl alcohol Ipaner, see 2,4-D IPE, see Isopropyl ether IPH, see Phenol Ipersan, see Trifluralin Iphanon, see Camphor Isceon 11, see Trichlorofluoromethane Isceon 122, see Dichlorodifluoromethane Iscobrome, see Methyl bromide Iscobrome D, see Ethylene dibromide Isoacetophorone, see Isophorone a-Isoamylene, see 3-Methyl-l-butene Isoamyl ethanoate, see Isoamyl acetate Isoamylhydride, see 2-Methylbutane Isoamylol, see Isoamyl alcohol Isobac, see 2,4-Dichlorophenol Isobenzofuran-l,3-dione, see Phthalic anhydride 1,3-Isobenzofurandione, see Phthalic anhydride IsoBuAc, see Isobutyl acetate IsoBuBz, see Isobutylbenzene Isobutane, see 2-Methylpropane Isobutanol, see Isobutyl alcohol Isobutene, see 2-Methylpropene Isobutenyl methyl ketone, see Mesityl oxide Isobutyl carbinol, see Isoamyl alcohol Isobutylene, see 2-Methylpropene Isobutylethylene, see 4-Methyl-l-pentene Isobutyl ketone, see Diisobutyl ketone Isobutyl methyl ketone, see 4-Methyl-2-pentanone Isobutyltrimethylmethane, see 2,2,4-Trimethylpentane Isocumene, see Propylbenzene Isocyanatomethane, see Methyl isocyanate Isocyanic acid, methyl ester, see Methyl isocyanate Isocyanic acid, methylphenylene ester, see 2,4-Toluene-diisocyanate... 

SYNONYMS 1,2-benzenedicarboxylic acid anhydride, isobenzofurandione, 1,3-phthalandione, phthalic acid anhydride. 

Most of the isobenzofurans that have been used as substrates for phthalazine syntheses are in practice either l,3-dihydro-l,3-isobenzofurandiones (i.e., phthalic anhydride derivatives) or 1,3-dihydro-l-isobenzofuran-l-ones (i.e., the lactonic phthalides), both of which normally undergo ring fission and reaction with hydrazine or the like to give phthalazinones. Discussion of these syntheses is subdivided according to the type of substrate used. 

Carbonylbis 1,3-isobenzofurandione 4,4 -Carbonylbis (phthalic anhydride). See 3,3, 4,4-Benzophenone tetracarboxylic dianhydride Carbonyl diamide Carbonyidiamine. See Urea 1,3-Carbonyi dioxypropane. See Propylene carbonate 4,4 -Carbonyidiphtnaiic acid anhydride 4,4 -Carbonyldiphthalk anhydride. See 3,3, 4,4-Benzophenone tetracarboxylic dianhydride Carborundeum Carborundum. See Silicon carbide Carbothialdine. See3,5-Dimethyl tetrahydro-2-H,1,3,5-thiadiazone-2-thione Carboxyaniline 2-Carboxyaniline o-Carboxyaniline. SeeAnthranilic acid Carboxybenzene. See Benzoic acid Carboxyethane. See Propionic acid... 

CAS 117-08-8 EINECS/ELINCS 204-171-4 Synonyms 1,3-lsobenzofurandione, 4,5,6,7-tetrachloro- Phthalic anhydride, tetrachloro- TCPA 4,5,6,7-Tetrachloro-1,3-isobenzofurandione 4,5,6,7-Tetrachlorophthalic anhydride Tetrachlorphthalic anhydride Classibcatton Chlorinated phthalic anhydride Empirical C CI,03 Formula C6CI,(C0)20... 

Carbon tetrafluoride. See Tetrafluoromethane Carbon trichloride. See Hexachloroethane Carbon trifluoride. See Trifluoromethane 5,5 -Carbonylbis 1,3-isobenzofurandione 4,4 -Carbonylbis (phthalic anhydride). See 3,3, 4,4 -Benzophenone tetracarboxylic dianhydride... 

The most widely used dibasic acid is phthalic anhydride (PA) (1,3-isobenzofurandione) [85-44-0]. The rigid aromatic rings increase the Tg of the resin. The first esterification reaction proceeds rapidly by opening the anhydride ring. The amount of water evolved is low, which also reduces reaction time. The next most widely used dibasic acid is IPA. Esters of IPA are more resistant to hydrolysis than are those of PA in the pH range of 4-8, the most important range for exterior durability. 

Synonyms Phthalic acid anhydride phthalan-dione 1,3-isobenzofurandione... 

Synonyms 1,2-Benzenedicarboxylic acid anhydride 1,3-Dioxophthalan 1,3-Isobenzofurandione PA 1,3-Phthalandione Phthalic acid anhydride... 

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