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 Estragole
140-67-0

Estragole synthesis

10synthesis methods
Obtained by fractional distillation of the oil of turpentine or by treating a solution of the same oil in ether with an aqueous solution of mercuric acetate and subsequently heating the aqueous phase with zinc and sodium hydroxide; forms allyl bromide and magnesium p-methoxy phenate in ether.
-

Yield:-

Reaction Conditions:

with tetrakis(triphenylphosphine) palladium(0);potassium carbonate in tetrahydrofuran at 0 - 50;Schlenk technique;Inert atmosphere;

Steps:

Method A:
General procedure: To an oven-dried Schlenk flask, arylboronic acid (10.0 mmol), Pd(PPh3)4 (0.20 mmol), K2CO3 (10.0 mmol), THF (50 mL) are added under Ar. The mixture is then stirred at 0 oC and added with allyl bromide (10.0 mmol) by syringe slowly. Then the mixture is stirred at 50 oC for 6-12 hours as monitored by TLC. After the reaction finished, the mixture was washed by brine and extracted by ethyl ether, and purified by column chromatography on silica gel to afford the allyl benzene substrates. (eluent: hexane).

References:

Wu, Shang;Zhang, Ying;Jiang, Hongyan;Ding, Ning;Wang, Yanbin;Su, Qiong;Zhang, Hong;Wu, Lan;Yang, Quanlu [Tetrahedron Letters,2020,vol. 61,# 26,art. no. 152053] Location in patent:supporting information

Estragole Related Search:

克什克腾旗| 农安县| 三门县| 东山县| 景谷| 吴忠市| 五家渠市| 云和县| 洪洞县| 司法| 肇州县| 鄢陵县| 日土县| 宣汉县| 保靖县| 永川市| 五家渠市| 东乌| 阆中市| 红桥区| 丹巴县| 沈阳市| 个旧市| 遂平县| 辽阳市| 德州市| 翼城县| 嘉峪关市| 永嘉县| 郴州市| 漳平市| 南和县| 刚察县| 突泉县| 北流市| 塔城市| 尤溪县| 林口县| 泊头市| 镇安县| 雅安市|