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 bellidifolin
2798-25-6

bellidifolin synthesis

5synthesis methods
-

Yield:2798-25-6 62%

Reaction Conditions:

with sodium hydride in acetone at -5 - 20; for 11 h;

Steps:

3 synthesis of bellidifolin
In a 50 mL single-necked flask,Add 10 mL of acetone,1,3,5,8-tetrahydroxytoxone 0.13 gAnd 0.11 g of methyl iodide,Ice bath cooling system internal temperature of -5 ,0.04 g of sodium hydride was added with stirring,After maintaining this temperature reaction for 1 h,Rose to room temperature reaction 10h,Add 10 mL of ice water to quench the reaction,After extraction with 10 mL * 2 with ethyl acetate,The organic phase was washed twice with water,After drying,Column chromatography,Eluent petroleum ether / ethyl acetate = 2/1,A pale yellow solid, 0.085 g,Yield 62%.

References:

Tianjin Agricultural University;SHANG, Zhi-qiang;QI, Bangda;LU, Li-juan;XU, Yan-ling CN106565660, 2017, A Location in patent:Paragraph 0011; 0012

FullText

bellidifolin Related Search:

西平县| 游戏| 巫溪县| 崇左市| 普兰县| 萝北县| 彭泽县| 乐清市| 安阳县| 丰城市| 建瓯市| 文安县| 黄龙县| 抚顺市| 高尔夫| 南川市| 抚州市| 东台市| 海门市| 石嘴山市| 长丰县| 行唐县| 陇西县| 盈江县| 四川省| 阿拉善右旗| 广丰县| 城固县| 雅江县| 五大连池市| 大厂| 灵宝市| 宁晋县| 周宁县| 镇雄县| 青田县| 焦作市| 秦安县| 大冶市| 那曲县| 剑川县|