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Maleic anhydride is a classic substrate for Diels-Alder reactions. [9] It was used for work in 1928, on the reaction between maleic anhydride and 1,3-butadiene, for which Otto Paul Hermann Diels and Kurt Alder were awarded the Nobel Prize in 1950. It is through this reaction that maleic anhydride is converted to many pesticides and pharmaceuticals.
9,10-Dihydroanthracene is an organic compound that is derived from the polycyclic aromatic hydrocarbon anthracene. Several isomers of dihydroanthracene are known, but the 9,10 derivative is most common. It is a colourless solid that is used as a carrier of H 2 as a hydrogen-donor. [2]
Anthracene is a solid polycyclic aromatic hydrocarbon (PAH) of formula C 14 H 10, consisting of three fused benzene rings. It is a component of coal tar . Anthracene is used in the production of the red dye alizarin and other dyes, as a Scintillator to detect high energy particles, as production of pharmaceutical drugs.
Anthracene, being less aromatic (and therefore more reactive for Diels–Alder syntheses) in its central ring can form a 9,10 adduct with maleic anhydride at 80 °C and even with acetylene, a weak dienophile, at 250 °C. [32]
2,3-Dimethylmaleic anhydride is an organic compound with the formula (CH 3) 2 C 2 (CO) 2 O. [1] It is related to maleic anhydride (MA) by replacement of the two CH units with CCH 3 groups. The compound can be prepared from two eqiuvalents of MA in the presence of 2-aminopyridine followed by treatment with sulfuric acid.
Melting point: 42 °C (108 °F; 315 K) Boiling point: 250 °C (482 °F; 523 K) ... maleic anhydride and fumaric acid. [7] Uses to study biomolecular condensates
Melting point: 119 to 120 °C (246 to 248 °F; 392 to 393 K) [3] ... Industrially, succinic anhydride is prepared by catalytic hydrogenation of maleic anhydride. [6]
Melting point 96 °C (205 °F; 369 K) [ 1 ] Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).