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-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: