تفاعل #55537

معادلة التفاعل

1,3-diaminopropane

2-nitro-2'-hydroxy-5'-methyl-azobenzene

water

→

2-(2'-hydroxy-5'-methylphenyl)-benzotriazole

المذيبات

xylene

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةthe whole is heated, with the exclusion of air
2. 2
   workup.ADDITIONis then added
3. 3
   أخرىThe aqueous phase is separated
4. 4
   استخلاصthe organic phase is extracted with aqueous hydrochloric acid
5. 5
   غسيلwashed with water until neutral
6. 6
   workup.DISTILLATIONThe xylene is distilled off
7. 7
   أخرىto leave 7.7 g of crude product

الإجراء التجريبي

11.6 g of 1,3-diaminopropane (0.16 mol) and 2 g of copper-II-acetate (0.01 mol) are placed into 50 ml of water and the whole is heated, with the exclusion of air and with stirring, to 85°-90° C. A solution of 10 g of 2-nitro-2'-hydroxy-5'-methyl-azobenzene (0.04 mol) in 100 ml of xylene heated to 60° C. is then added, and after 20 hours the reaction mixture is cooled to room temperature. The aqueous phase is separated, and the organic phase is extracted with aqueous hydrochloric acid, and then washed with water until neutral. The xylene is distilled off to leave 7.7 g of crude product. Analysis of the crude product by means of LC (liquid chromatography) gives 86% of theory of 2-(2'-hydroxy-5'-methylphenyl)-benzotriazole.

المصدر