一二三四区视频,亚洲少妇熟女色,日本久热无码视频网,欧美国产日韩大尺度,亚洲a视频,久久少妇一区二区,日韩999无码视频,刺激久久久久久久,啊啊啊啊不要啊在线

Welcome to chemicalbook!
Chinese English Japanese Germany Korea
010-86108875
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 2-BROMO-4-CHLOROPHENYL ACETATE
98434-18-5

2-BROMO-4-CHLOROPHENYL ACETATE synthesis

2synthesis methods
-

Yield:98434-18-5 96%

Reaction Conditions:

with triethylamine in dichloromethane at 0; for 3 h;

Steps:

22 Intermediate 94: 2-bromo-4-chlorophenyl acetate

To a solution of 2-bromo-4-chlorophenol (20 g, 96 mmol) in Dichloromethane (200 mL) was added acetyl chloride (1 1 .35 g, 145 mmol) and triethylamine (29.3 g, 289 mmol). The mixture was stirred at 0 °C for 3 h. Water was then added and the mixture was extracted with ethyl acetate. The organic layer was dried over Na2S04, filtered and purified by chromatography on silica gel (hexane/EtOAc = 5/1 ) to give the desire product 2-bromo-4-chlorophenyl acetate (23 g, 92 mmol, 96 % yield) as a yellow solid. 1 H NMR (400 MHz, CDCI3) δ 7.60 (d, J = 2.5Hz, 1 H), 7.29 (dd, J = 2.5, 8.5Hz, 1 H), 7.05 (d, J = 8.5Hz, 1 H), 2.34 (s, 1 H)ppm

References:

WO2019/63748,2019,A1 Location in patent:Page/Page column 277

景洪市| 祁东县| 哈密市| 迁西县| 龙海市| 泗水县| 夏邑县| 封开县| 福建省| 威海市| 元江| 忻州市| 昆山市| 鄯善县| 云林县| 莱西市| 罗平县| 巫山县| 宜川县| 仁布县| 连平县| 乌苏市| 太和县| 彰武县| 庄河市| 蓝山县| 石家庄市| 威海市| 襄樊市| 武胜县| 姜堰市| 封开县| 惠来县| 延安市| 芜湖市| 泰来县| 满城县| 龙里县| 麻江县| 西华县| 军事|