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 2,4'-Dibromoacetophenone
99-73-0

2,4'-Dibromoacetophenone synthesis

13synthesis methods
-

Yield:99-73-0 219 mg

Reaction Conditions:

with water;sodium sulfite in ethyl acetate;acetone at 20;

Steps:

4.3. General procedure for synthesis of a-bromoketones (3a-3k)

General procedure: To a stirred solution of alkyne (1 mmol) in ethyl acetate(1 mL), 0.1 mL of acetone:water (1:1) and TsNBr2 (2 mmol) wasadded. After 10 min Na2SO3 (8 mmol) was added and the reaction was stirred at room temperature till completion asmonitored by TLC. The organic layer was extracted with ethylacetate, washed with water, dried with Na2SO4 and concentrated.The crude product was purified by flash chromatographyon silica gel (230-400 mesh) using petroleum ethereethyl acetateas eluent.

References:

Rajbongshi, Kamal Krishna;Hazarika, Debojit;Phukan, Prodeep [Tetrahedron,2016,vol. 72,# 29,p. 4151 - 4158]

2,4'-Dibromoacetophenone Related Search:

天祝| 五原县| 永仁县| 深泽县| 团风县| 江川县| 雅江县| 海兴县| 镶黄旗| 龙泉市| 潼南县| 宁海县| 佛教| 成武县| 航空| 镇安县| 绥芬河市| 涟源市| 资兴市| 洛川县| 木兰县| 准格尔旗| 伽师县| 延长县| 咸阳市| 平泉县| 塔河县| 盐城市| 彰武县| 万宁市| 基隆市| 涡阳县| 盘锦市| 井陉县| 张掖市| 南京市| 湘潭市| 马鞍山市| 报价| 陇川县| 阿尔山市|