2-[2-hydroxy-3,5-di-(.alpha.,.alpha.-di-methylbenzyl)...

Details 2-[2-hydroxy-3,5-di-(.alpha.,.alpha.-di-methylbenzyl)... 2-[2-hydroxy-3,5-di-(.alpha.,.alpha.-di-methylbenzyl)...

C - Chemistry, Metallurgy

09

B

260/173

C09B 29/12 (2006.01)

Patent

CA 1168655

3-11775/CGS 865/1+2/B Process for the preparation of nitroazobenzenes Abstract Process for the preparation of compounds of the formula Image which comprises adding the diazonium salt of an amine of the formula Image to a strongly alkaline lower alkanol solution, or aqueous solution thereof, which contains a phenol of the formula Image the phenol solution containing an alkali hydroxide in amounts such that a pH value of above 11 is ensured and that excess hydroxyl ions are present even after neutralizing the acid diazonium salt and the reaction temperature being -15°C to + 30°C.

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