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 2H-Pyran-4-carboxylicacid,tetrahydro-,hydrazide(9CI)
59293-18-4

2H-Pyran-4-carboxylicacid,tetrahydro-,hydrazide(9CI) synthesis

2synthesis methods
-

Yield:59293-18-4 98%

Reaction Conditions:

with hydrazine monohydrate in methanol at 20;Reflux;Inert atmosphere;

Steps:

241 oxane-4-carbohydrazide

To a stirred solution of methyl tetrahydro-2H-pyran-4-carboxylate (4 g, 27.75 mmol) in MeOH (50 mL) at RT, hydrazine monohydrate (10.8 mL, 222 mmol) was added portion-wise and the resulting reaction mixture was stirred at reflux O/N. The mixture was allowed to reach RT and concentrated under vacuum affording the title compound oxane-4-carbohydrazide (p241 , 3.9 g, y= 98%) as white solid. MS (/T7/z): 145.1 [MH]+.

References:

WO2016/67043,2016,A1 Location in patent:Page/Page column 154

2H-Pyran-4-carboxylicacid,tetrahydro-,hydrazide(9CI) Related Search:

姜堰市| 衡东县| 玛多县| 嵊泗县| 宁津县| 漳浦县| 东丰县| 定远县| 周宁县| 清水河县| 宜良县| 桓仁| 嵩明县| 宜昌市| 安阳市| 乌拉特前旗| 泸定县| 陆川县| 义乌市| 方正县| 汽车| 曲松县| 宁都县| 沧源| 珠海市| 陈巴尔虎旗| 闻喜县| 特克斯县| 榕江县| 漳州市| 新龙县| 盐山县| 长沙县| 旬邑县| 杭锦旗| 鄱阳县| 牟定县| 肇东市| 汶川县| 武功县| 温宿县|