Title:  Duroquinone 
CAS Registry Number:  527-17-3 
CAS Name:  2,3,5,6-Tetramethyl-2,5-cyclohexadiene-1,4-dione 
Additional Names:  tetramethyl-p-benzoquinone 
Molecular Formula:  C10H12O2 
Molecular Weight:  164.20 
Percent Composition:  C 73.15%, H 7.37%, O 19.49% 
Literature References:  Prepn by reduction of dinitrodurene:  Smith, Org. Synth. vol. 10, 40 (1930); Smith, Dobrovolny, J. Am. Chem. Soc. 48, 1420 (1926); by condensation of 2,3-diketopentane with itself in presence of alkalies:  von Pechmann, Ber. 21, 1420 (1888); by the action of alkalies on 3,3-dichloropentan-2-one:  Faworsky, J. Prakt. Chem. [2] 51, 538 (1895). 
Properties:  Yellow needles from alc, mp 111-112°.  Sublimes.  Volatile with steam.  Insol in water; sol in alcohol, benzene, ether, hot petr ether. 
Melting point:  mp 111-112°   |