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 3-(4-BROMO-PHENYL)-3-OXO-PROPIONIC ACID METHYL ESTER
126629-81-0

3-(4-BROMO-PHENYL)-3-OXO-PROPIONIC ACID METHYL ESTER synthesis

7synthesis methods
-

Yield: 86%

Reaction Conditions:

with sodium hydride in tetrahydrofuranReflux;

Steps:

Procedure B22:
General procedure: Substrates 1g-j and 1l were prepared adaptedfrom a previously reported procedure with some modications: toa solution of ketone (20 mmol) in THF (80 mL) was added methyldicarbonate (60 mmol) and NaH (40 mmol, 60%). The reactionmixture was reuxed until TLC indicated complete consumption ofthe ketone. After cooling, the reaction mixture was poured into ice-water (100 mL), acidied with aqueous HCl (3 M) to pH 2e3 andextracted with EA (100 mL 3). The combined organic layer wasdried over Na2SO4 and evaporated under reduced pressure. Thedesired pure product was obtained by silica gel chromatographyusing a mixture of EA/PE (v/v 1/9) as eluent.

References:

Sun, Jiyun;Ge, Huaibin;Zhen, Xiaohua;An, Xuechan;Zhang, Guangtao;Zhang-Negrerie, Daisy;Du, Yunfei;Zhao, Kang [Tetrahedron,2018,vol. 74,# 17,p. 2107 - 2114]

3-(4-BROMO-PHENYL)-3-OXO-PROPIONIC ACID METHYL ESTER Related Search:

松江区| 壶关县| 原阳县| 宁河县| 巴南区| 曲阳县| 江华| 宜都市| 施秉县| 辛集市| 即墨市| 古丈县| 台北市| 庄浪县| 图木舒克市| 鄯善县| 穆棱市| 三门峡市| 彰化市| 休宁县| 奇台县| 金平| 台州市| 五大连池市| 伊春市| 四平市| 新田县| 佛学| 玛曲县| 大同市| 莱芜市| 沙田区| 青川县| 灌云县| 大名县| 喀喇| 武隆县| 施秉县| 泰来县| 鄂托克前旗| 保定市|