成人免费xx,国产又黄又湿又刺激不卡网站,成人性视频app菠萝网站,色天天天天

Welcome to chemicalbook!
Chinese English Japanese Germany Korea
400-158-6606
Try our best to find the right business for you.
Do not miss inquiry messages Please log in to view all inquiry messages.

Welcome back!

ChemicalBook CAS DataBase List Disperse Orange 76
13301-61-6

Disperse Orange 76 synthesis

1synthesis methods
2,6-Dichioro-4-nitroaniline diazo, and N-ethyl-N-cyanoethylaniline?coupling.
-

Yield:-

Reaction Conditions:

Stage #1:4-nitro-2,6-dichloroaniline with naphthalene-1,5-disulfonate in ethyl acetate at 50; for 0.166667 h;
Stage #2: with tert.-butylnitrite in ethyl acetate at 25; for 0.333333 h;
Stage #3:N-ethyl-N-(2-cyanoethyl)aniline with hydrogenchloride in water at 0 - 5; for 0.166667 h;

Steps:

2.4 Typical procedure for coupling
General procedure: N,N-Diethylaniline (10mmol) was dissolved in 80mL water with 1.2mL 37% hydrochloric acid and then the salmon pink diazonium salt of 2,4-dinitroaniline was quickly added within 2minat 0°C-5°C followed by adjusting the pH to 4-5 with 2M NaOH solution. The reaction endpoint was confirmed by color reaction using H-acid. The precipitated dye was filtered, washed with water and dried at 80°C to afford the crude product. The crude yield was 95.0% and the degree of purity was 97.0%.

References:

Qiu, Jinjing;Tang, Bingtao;Ju, Benzhi;Xu, Yuanji;Zhang, Shufen [Dyes and Pigments,2017,vol. 136,p. 63 - 69]

FullText

Disperse Orange 76 Related Search: