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 5'-BROMO-2'-HYDROXY-3'-NITROACETOPHENONE
70978-54-0

5'-BROMO-2'-HYDROXY-3'-NITROACETOPHENONE synthesis

1synthesis methods
Preparation by nitration of 5-bromo-2-hydroxyacetophenone in refluxing carbon tetrachloride (88%).
-

Yield: 73%

Reaction Conditions:

with nitric acid in tetrachloromethane

Steps:

1 1I 5-Bromo-2-hydroxy-3-nitroacetophenone
1I 5-Bromo-2-hydroxy-3-nitroacetophenone A solution of 5-bromo-2-hydroxyacetophenone (23.7 g, 0.110 mol) in carbon tetrachloride (90 ml) was added with concentrated nitric acid (17.2 ml). The mixture was left under stirring at 75° C. for 50 minutes, then left to cool at room temperature. The precipitated solid was recovered by filtration washing with cold carbon tetrachloride. After drying under vacuum, 20.9 g of the title product were obtained as a light yellow solid (73% yield). 1 H N.M.R. (300 MHz, CDCl3) δ ppm: 2.73 (s, 3H); 8.14 (d, 1H); 8.31 (d, 1H); 12.92 (s, 1H).

References:

Laboratorios Menarini S.A. US5990142, 1999, A

5'-BROMO-2'-HYDROXY-3'-NITROACETOPHENONE Related Search: