The diamagnetic susceptibilities of phthalic acid and phthalic anhydride

1949 ◽  
Vol 30 (2) ◽  
Author(s):  
Bawa Kartar Singh ◽  
Kanwar Maghar Singh Manhas ◽  
Mahan Singh ◽  
Vimla Puri
Keyword(s):  
Phthalic Anhydride ◽  
Phthalic Acid

Réaction du sulfure de bore avec quelques composés difonctionnels

1972 ◽  
Vol 50 (11) ◽  
pp. 1675-1677 ◽  
Author(s):  
S. Jerumanis ◽  
P. A. Begin ◽  
D. Vu Cong
Keyword(s):  
Salicylic Acid ◽  
Succinic Acid ◽  
Phthalic Anhydride ◽  
Maleic Acid ◽  
Phthalic Acid ◽  
Quantitative Yield

Catechol reacts with boron sulfide to give 2,2′-o-phenylenedioxybis-(1,3,2-benzodioxaborole) (1) while only the hydroxyl function of salicylic acid reacts to give a quantitative yield of tris(o-carboxylphenoxy)borane (3). Phthalic acid is dehydrated to phthalic anhydride, but succinic acid and maleic acid have been found inert to the action of the boron sulfide.

scholarly journals Synthesis of Novel Symmetrical and Unsymmetrical o-Phthalic Acid Diamides

2014 ◽  
Vol 2014 ◽  
pp. 1-9
Author(s):  
Padam Praveen Kumar ◽  
Yervala Dathu Reddy ◽  
Chittireddy Venkata Ramana Reddy ◽  
Bhoomireddy Rama Devi ◽  
Pramod Kumar Dubey
Keyword(s):  
Acetic Acid ◽  
Phthalic Anhydride ◽  
Phthalic Acid ◽  
Secondary Amines ◽  
Benzoic Acids ◽  
The Novel ◽  
Coupling Reagent

Phthalic anhydride was treated with secondary amines in acetic acid yielding 2-(diethyl (or) 4-alkylpiperazine or morpholine-1-carbonyl) benzoic acids. The latter were reacted, again, with secondary amines and arylamines by using the coupling reagent HATU and Et3N as a base in DMF giving the novel symmetrical o-phthalic acid diamides [o-R1R1NCOC6H4CONR1R1], unsymmetrical o-phthalic acid diamides [o-R1R1NCOC6H4CONR1R2], and primary amidic-secondary amidic containing unsymmetrical o-phthalic acid diamides [o-R1R1NCOC6H4CONHAr], respectively.

The Determination of Phthalic Anhydride in Crude Phthalic Acid.

1918 ◽  
Vol 10 (8) ◽  
pp. 596-598
Author(s):  
Charles R. Downs ◽  
Charles G. Stupp
Keyword(s):  
Phthalic Anhydride ◽  
Phthalic Acid

Isolation and identification of by-products of gas phase catalytic oxidation of anthracene to 9,10-anthraquinone

1983 ◽  
Vol 48 (1) ◽  
pp. 112-122 ◽  
Author(s):  
Ivan Chvátal ◽  
Jan Vymětal ◽  
Jaroslav Pecha ◽  
Vilím Šimánek ◽  
Ladislav Dolejš ◽  
...  
Keyword(s):  
Maleic Anhydride ◽  
Catalytic Oxidation ◽  
Gas Phase ◽  
Phthalic Anhydride ◽  
Maleic Acid ◽  
Phthalic Acid ◽  
Diels Alder ◽  
Acid Anhydride ◽  
Isolation And Identification ◽  
By Products

A total of 29 associate components were identified in technical 9,10-anthraquinone. The product contained all the prominent impurities present in the starting anthracene except for 9,10-dihydroanthracene and fluorene. 9-(9'-Anthryl)-carbazole and Diels-Alder type adducts of anthracene with maleic anhydride and with maleinimide were also detected. The isolated and identified by-products of oxidation of anthracene were 1,4-anthraquinone, 4,4'-dioxo-1,1'-bianthrylidene, 4,10'-dioxo-1,9'-bianthrylidene, 1-(4'-oxy-1'-naphthylidene)-4-oxyanthracene, 2,3-naphthalenedicarboxylic acid and anhydride, and 5,7,12,14-tetrahydro-5,14;7,12-di(o-benzeno)pentacene-6,13-dione. Of the compounds formed by oxidation of the anthracene impurities, isolated and identified were dibenzo[b,d]pyrone, xanthone, 1,8-naphthalenedicarboxylic acid anhydride,9-fluorenone, and naphthol[2,3-b]thiophene-4,9-dione. As products of a deeper oxidation of the starting compounds, phthalic anhydride, maleic anhydride, maleinimide, phthalic acid, and maleic acid were found. Four additional components whose structure could not be determined were also isolated. The pathway of the anthracene oxidation is suggested.

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