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
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 2-CHLORODIBENZO-P-DIOXIN
39227-54-8

2-CHLORODIBENZO-P-DIOXIN synthesis

8synthesis methods
-

Yield:39227-54-8 70%

Reaction Conditions:

with copper;potassium carbonate in N,N-dimethyl-formamide at 150; for 24 h;

Steps:

1

3.15 g (10 mmol) of 2-bromo-4-chloro-1-iodinebenzene, 1.10 g (10 mmol) of 1,2-benzenediol, 0.3 g (5 mmol) of Cu, and 2.76 g (20 mmol) of K2CO3 were dissolved in 50 ml of DMF, and then, the mixed solution was stirred at a temperature of 150° C. for 24 hours. After the reaction solution was cooled to room temperature, 60 ml of water was added thereto, and an extraction process was performed thereon three times by using 60 ml of ethylether. An organic layer collected therefrom was dried by using magnesium sulfate, and residual obtained by evaporating a solvent therefrom was separation-purified by silica gel chromatography to obtain 1.526 g (yield: 70%) of Intermediate A.

References:

US2018/13076,2018,A1 Location in patent:Paragraph 0351; 0352

2-CHLORODIBENZO-P-DIOXIN Related Search: