天堂网亚洲,天天操天天搞,91视频高清,菠萝蜜视频在线观看入口,美女视频性感美女视频,95丝袜美女视频国产,超高清美女视频图片

Welcome to chemicalbook!
Chinese English Japanese Germany Korea
400-158-6606
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 4-Methylanisole
104-93-8

4-Methylanisole synthesis

14synthesis methods
By methylation of p-cresol.
-

Yield:104-93-8 99%

Reaction Conditions:

with tetrabutylammomium bromide;potassium carbonateReflux;

Steps:

1.1 (1) Synthesis of Compound I.
Equipped with reflux condenser 1000ml round bottom flask was added 33ml of p-methyl phenol,48.3 g of tetrabutylammonium bromide, 62.1 g of K2C03 and 450 ml of dimethyl carbonate, Warmed to reflux, TLC monitoring of the reaction process; TLC monitoring of raw materials after reaction,Steamed excess dimethyl carbonate, cooled to room temperature, filtration,Dropping the mass concentration of 10% hydrochloric acid to adjust the pH to 5 ~ 6, extracted with dichloromethane,Dry Na2S04 anhydrous, filter, remove the solvent under reduced pressure,Get 36.5g light yellow special smell of oily liquid I,The molar yield is 99%.

References:

Hubei Longxiang Pharmaceutical Technology Co., Ltd.;Chen Qingping;Xu Lingyan;Guo Xichang;Wu Kai;Wu Donglin CN107311938, 2017, A Location in patent:Paragraph 0031; 0032; 0044; 0045

FullText

4-Methylanisole Related Search: