P-benzoquinone monoimine

Elastomers BHT, Cyanox 2246, Cyanox 425, Permanax WSP, Naugawhite, Wingstay T, Naugard SP, Vulkanox CS Soxhlet extraction with acetone, evaporative concentration Merck 11845 silica gel Benzene Sprayed with 2.34% sodium tetraborate, 0.33% sodium hydroxide, and 0.1% methanolic solution of A-chlorodichloro-2,6-p-benzoquinone monoimine Sample size 20 pL [38]... 

Sprayed with 2.34% sodium tetraborate, 0.33% sodium hydroxide, and 0.1% methanolic solution of /V-chlorodichloro-2,6-p-benzoquinone monoimine... 

Nair and coworkers reported that the choice of Lewis acid is crucial in the addition of allyltriisopropylsilane onto p-quinoneimines (37) (Equation 23) and p-benzoquinone monoimine (38) (Equation 24) [28]. When BF3 OEt2 is used for this reaction, the products obtained are indane derivatives. 

Benzoquinone-1,4 monoimine [called Benzochinon -(1.4)-mDnDimid p-Chinon-monoimid Dr p-Chinon-imid in Ger], HN CgH4 0 mw 107.11, N 13.08% ... 

The rates of formation of some phenazines by cyclization of di- and monoimines of JV-(2-aminophenyl)-l,4-benzoquinone have been determined spectrophotometrically. The reaction of 2-aminoindamines (quinoneimines) is a similar example (see Hotiben-Weyl, Vol. 7/3 b, p 330). The oxidation of benzene-1,2,4-lriamine (16) takes place through a series of intermediates, c.g. initial oxidation of 2-amino-l, 4-quinonediiminc (17) is followed by its condensation with beiizene-1,2,4-triamine (16) which leads to the formation of the indamine derivative 18 which, on further oxidation, undergoes cyclization to the amino-substituted phenazine. Different isomers of phenazinetriamines 19 can thus be formed. 

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