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-methylpyridine
3430-13-5

5-Bromo-2-methylpyridine synthesis

11synthesis methods
5-Bromo-2-methylpyridine can be used as a pharmaceutical intermediate in the production of cardiovascular and cerebrovascular drugs. Its synthesis method is that the mixtrue of diethyl malonate and sodium hydrogen was stirred for 1h, add 5-nitro-2-chloropyridine in toluene and react for 1.5h at 110℃, then stirred for 15h at RT, and purify to obtain 5-nitro-2-methylmethane pyridine, 94%.
-

Yield:-

Steps:

B.39
(B-39) Using 6-methylpyridine-3-ol, with reference to J. Org. Chem. 1967,32,1607, 5-bromo-2-methylpyridine was synthesised. NMR(CDCl3) δ: 2.51(3H, s), 7.05(1H, d, J=8.3Hz), 7.68(1H, d, J=2.5, 8.3Hz), 8.55(1H, d, J=2.3Hz).

References:

SHIONOGI & CO., LTD. EP1422218, 2004, A1 Location in patent:Page 162

5-Bromo-2-methylpyridine Related Search:

青龙| 滨海县| 慈溪市| 万安县| 兴宁市| 太保市| 汝城县| 屯昌县| 淮南市| 襄汾县| 丘北县| 阜南县| 东兰县| 江源县| 南雄市| 镇沅| 日照市| 同仁县| 寿阳县| 德庆县| 临高县| 安康市| 平安县| 吴桥县| 安新县| 绍兴县| 公安县| 全州县| 老河口市| 香格里拉县| 陇川县| 吉隆县| 苍梧县| 安丘市| 九江县| 扎赉特旗| 芮城县| 红河县| 大安市| 马尔康县| 许昌市|