Cyclohexadiene 2,3,5,6-tetrachloro-

Tetrachloro-2,5-cyclohexadiene-l,4-dione. 4,5-Dichloro-3,6-dioxo-l,4-cyclohexadiene-l,2-dicarbonitrile. 

Concerns have arisen recentiy over potential presence of dioxins in dyes produced from 2,3,5,6-tetrachloro-2,5-cyclohexadiene [118-75-2]. 

Condensation of 2,3,5,6-tetrachloro-2,5-cyclohexadiene [118-75-2], C6C1402, with 9-ethyl-91T-carbazol-3-amine [132-32-1], C14H14N2, (11) leads fkst to (22) [6358-30-1]. Treatment with IV-methylol-a-chloroacetamide [2832-19-1] and sulfuric acid produces (23) [87564-36-1], which forms the pyridinium... 

AI3-03797 1,4-Benzoquinone, 2,3,5,6-tetrachloro- p-Benzoquinone, 2,3,5,6-tetrxhloro- Caswell No. 171 CCRIS 7155 Chloranil p-Chloranil Chloranile Covetsan 2,5-Cyclohexadiene-... 

Cyclohexadiene-l,2-dione, 3,4,5,6-tetrachloro- o-chloranil, o-TCQ) oxidation of allylic alcohols, 133... 

Tetrachloro-l,2-benzenediol 2,2 43-Tetrachlorobiphenyl 2,3 4,5-Tetrachlorobiphenyl 2,3 5,6-Tetrachloro-2,5-cyclohexadiene-l,4-dione 2,3 7,8-Tetrachlorodibenzo-/ -dioxin l,l,2,2-Tetrachloro-l,2-difluoroethane... 

Tetrachloro-2,5-cyclohexadiene-1,4-dione Tetrachloroquinone Tetrachloro-p-quinone... 

Dechlorination. The reductive dechlorination of tetrachloro-cyclohexadienes with sodium in ethanol or in liquid ammonia is difficult to stop at the diene stage, usually one double bond of the diene system is also reduced. However, the deschloro-diene can be obtained under controlled conditions at low temperatures (eq... 

Category A 1,3-Cyclohexadiene-Forming Reactions. Diels-Alder reactions of thiophene 1,1-dioxides and their derivatives usually lead to 1,3-cyclohexadiene derivatives with spontaneous loss of sulfur dioxide from the initial adducts. This type of reaction has been most extensively examined with tetrachlorothiophene 1,1-dioxide. A large variety of olefinic compounds reacted with tetrachlorothiophene 1,1-dioxide to form l,2,3,4-tetrachloro-l,3-cyclohexadiene derivatives... 

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