2,2'-ジヒドロキシ-4,4'-ジメトキシベンゾフェノン 化學(xué)特性,用途語(yǔ),生産方法
外観
うすい黃色～黃褐色, 結(jié)晶～粉末
定義
本品は、ベンゾフェノンの誘導(dǎo)體であり、次の化學(xué)式で表される。
溶解性
熱メタノールに溶け、水に溶けにくい。
無(wú)機(jī)性値/有機(jī)性値
335/300
用途
紫外線吸収剤、有機(jī)合成原料。
化粧品の成分用途
褪色防止剤、香料
化學(xué)的特性
Yellow crystalline powder
使用
As ultraviolet light absorber, especially in paints, plastics.
製造方法
preparation by reaction of 2-hydroxy-4-methoxy-benzoic acid with resorcinol monomethyl ether in the presence of zinc chloride and phosphorous oxychloride at 7075° for 2.
合成
A synthetic method steps of 2,2'-dihydroxy-4,4'-dimethoxybenzophenone are:
1) In the presence of a catalyst, m-xylylene dimethyl ether and oxalyl chloride were reacted at 70-80°C for 1.5 hours to obtain the intermediate product 2,2' 4,4'-tetramethoxybenzophenone, said The ratio of the amount of m-phthalyl ether to the amount of oxalyl chloride is 1:1-20, the catalyst used is azoisobutyronitrile or benzoyl peroxide, and the amount of the catalyst is the mass of m-xylylene 0.5%-2%;
2) React the intermediate product obtained in step 1) with the Lewis acid under the condition of an organic solvent as a solvent, the reaction temperature is 50°C, and the time is 2-3 hours. After stopping the reaction, add water for hydrolysis, liquid separation, rotary evaporation, and recrystallization. That is, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone is obtained;
The Lewis acid is one of AlCl3 , ZnCl2 , BF3 and polyphosphoric acid; the organic reagent is one of dichloroethane, toluene, xylene, nitrobenzene and chlorobenzene; The reactions in the steps 1) and 2) are carried out under the protection of inert gas.
2,2'-ジヒドロキシ-4,4'-ジメトキシベンゾフェノン 上流と下流の製品情報(bào)
原材料
準(zhǔn)備製品