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 5-Bromo-2-methoxypyridine
13472-85-0

5-Bromo-2-methoxypyridine synthesis

14synthesis methods
5-Bromo-2-methoxypyridine is used as a ligand for central nicotinic acetylcholine receptor.  It was prepared from 2,5-dibromopyridine with sodium hydroxide by stirring in methanol refluxed for 5 h.
-

Yield:13472-85-0 98%

Reaction Conditions:

with sodium hydroxide for 5 h;Reflux;

Steps:

3.1, 1Br Example 3
(1) In a 500 ml reaction flask, 47 g of 2,5-dibromopyridine,8 g of solid sodium hydroxide and 200 ml of methanol,Stirring began to heat up to reflux, the reaction time was 5 hours,Stop the reaction, steamed most of the methanol, cooled, add 100 ml of water,Extract once with dichloromethane, remove methylene chloride to give the crude product,The crude product was distilled under reduced pressure to give 2-methoxy-5-bromopyridine,The yield is 98%.

References:

Huaihua Jinxin New Materials Co., Ltd.;Wang Youming CN106905229, 2017, A Location in patent:Paragraph 0026; 0027

FullText

5-Bromo-2-methoxypyridine Related Search:

高碑店市| 苏尼特左旗| 景东| 阿克| 沁阳市| 天长市| 化德县| 仁化县| 高清| 洪江市| 西乌珠穆沁旗| 宜阳县| 石河子市| 正阳县| 青海省| 应用必备| 青田县| 龙海市| 浙江省| 松江区| 武强县| 黄大仙区| 涿州市| 宁南县| 海晏县| 陆河县| 张家港市| 双鸭山市| 东港市| 威信县| 徐州市| 高平市| 荥经县| 沽源县| 广元市| 石狮市| 隆德县| 松江区| 南乐县| 三原县| 沂源县|