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 METHYL 2,2-DICHLORO-1-METHYLCYCLOPROPANECARBOXYLATE
1447-13-8

METHYL 2,2-DICHLORO-1-METHYLCYCLOPROPANECARBOXYLATE synthesis

4synthesis methods
-

Yield:1447-13-8 88.7%

Reaction Conditions:

with benzyltriethylammonium bromide;sodium hydroxide at 20; for 4 h;

Steps:

3.1 cyclopropylation reaction

To a 500 ml three-neck round bottom flask equipped with a mechanical stirrer,30.3 g of methyl methacrylate (0.3 mol),100 ml of chloroform,0.5 g of triethylbenzylammonium bromide,160 ml of a 30% solution of sodium hydroxide,Followed by stirring at room temperature for 4 hours. Stirring was stopped,Layers are placed.The lower layer is organic phase,Most of the cycloaddition products are in the organic phase,The upper water layer,80 ml of concentrated hydrochloric acid was added dropwise to the aqueous layer with stirring to pH = 1,Stirred for another half hour, extracted with dichloromethane, the combined organic phases dried, evaporated to remove the solvent,To give 48.7 g of methyl 2,2-dichloro-1-methylcyclopropanecarboxylate,The yield was 88.7%Purity & gt; 95%

References:

CN104447293,2016,B Location in patent:Paragraph 0051-0053

METHYL 2,2-DICHLORO-1-METHYLCYCLOPROPANECARBOXYLATE Related Search:

石家庄市| 余庆县| 昌平区| 洞口县| 紫云| 长白| 左贡县| 沐川县| 靖江市| 兰西县| 定结县| 随州市| 台北市| 延庆县| 海阳市| 白玉县| 洛南县| 左贡县| 辉南县| 乾安县| 阿鲁科尔沁旗| 潞城市| 黑河市| 龙江县| 安庆市| 五大连池市| 佛冈县| 桑植县| 淮南市| 寿光市| 怀来县| 凤山县| 凤阳县| 噶尔县| 青阳县| 屏东县| 十堰市| 民丰县| 上饶市| 开江县| 沧州市|