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 1,4-Dibromobutane
110-52-1

1,4-Dibromobutane synthesis

10synthesis methods
-

Yield:110-52-1 95%

Reaction Conditions:

with 1,2-dibromo-1,1,2,2-tetrachloroethane;triphenylphosphine in dichloromethane at 20; for 0.15 h;Appel Halogenation;

Steps:

3.3. General procedure for conversion to bromide

General procedure: PPh3 (2.2 mmol) was dissolved in freshly distilled dichloromethane (4.0 mL) at 20 °C. A solution of DBTCE (2.2 mmol) in freshly distilled dichloromethane (4.0 mL) was added to the solution dropwise and the white colloidal mixture was stirred for 2 min. A solution of alcohol (2.0 mmol) or cyclic ether (1.0 mmol) in freshly distilled dichloromethane (4.0 mL) was added to the mixture dropwise over 2 min and during adding the reaction mixture became a colorless solution. The resulting solution was stirred for 5 min and the mixture was purified by flash column on 20 g of silica gel using petroleum ether or a mixture of petroleum ether/EtOAc (1:1).

References:

Essiz, Sel?uk;Da?tan, Arif [Turkish Journal of Chemistry,2019,vol. 43,# 1,p. 150 - 156]

1,4-Dibromobutane Related Search: