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-Oxo-4-p-tolylbutanoic acid, ethyl ester
6942-61-6

4-Oxo-4-p-tolylbutanoic acid, ethyl ester synthesis

11synthesis methods
-

Yield:6942-61-6 96%

Reaction Conditions:

with toluene-4-sulfonic acidReflux;

Steps:



General procedure: The general procedure for the preparation of compounds (3a, 3b and 3c): a mixture of theappropriate acid 2a-c (1 equiv, 10 mmol) and p-toluenesulfonic acid (0.4 equiv, 4 mmol) in EtOH(20 mL) was refluxed for 6-8 h and evaporated to remove EtOH. The residue was suspended in H2O(30 mL) and extracted with EtOAc (2 x 50 mL) which was further purified by column chromatographyon silica gel eluting with AcOEt-petroleum ether (1:4, v/v) to get 3a-c as crystals.

References:

Tan, Jie;Zhou, Min;Cui, Xinhua;Wei, Zhuocai;Wei, Wanxing [Molecules,2018,vol. 23,# 3,art. no. 637]

4-Oxo-4-p-tolylbutanoic acid, ethyl ester Related Search: