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-BROMO-2,2-DIMETHOXYPROPANE
126-38-5

1-BROMO-2,2-DIMETHOXYPROPANE synthesis

3synthesis methods
-

Yield:126-38-5 87.2%

Reaction Conditions:

with hydrogenchloride in methanol;water at 20; for 2 h;

Steps:

1.2-5.2
S2. Upper protection reaction: Dissolve 30 g of 1-bromoacetone in 13 mL of methanol at room temperature, add 26 g of trimethyl orthoformate and 5.2 g of concentrated hydrochloric acid in sequence, stir and react at room temperature for 2 hours, and TLC detects that the reaction is complete.Adjust the reaction solution to weakly alkaline with a small amount of triethylamine. After removing the trimethyl orthoformate by rotary evaporation, add cold sodium hydroxide methanol solution, extract with dichloromethane, and spin dry the solvent to obtain the product 1-bromo-2 , 2-Dimethoxypropane 35.76g, the yield was 89.2percent.

References:

Beijing Fu Baike Biological Co., Ltd.;Du Chimin CN111348992, 2020, A Location in patent:Page/Page column 4-6

FullText

1-BROMO-2,2-DIMETHOXYPROPANE Related Search: