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 BETA-CHLOROLACTIC ACID
1713-85-5

BETA-CHLOROLACTIC ACID synthesis

12synthesis methods
-

Yield:1713-85-5 52%

Reaction Conditions:

with nitric acid at 100; for 12.5 h;Cooling with ice;

Steps:

3.1 Preparation of 3-chloro-2-hydroxypropionic acid
10.0 g of epichlorohydrin was placed in a 250 ml round bottom flask, and iceStirring in a bath, 30 ml of concentrated nitric acid (concentration 65-68%) by dropwise dropwise over about 30 minutes. Remove the ice bath and heat it100 ° C for 12 hours. Add 7 grams of sodium bicarbonate, 50 ml of anhydrous ether extraction four times. The organic phase was dried with anhydrous magnesium sulfateDried, filtered, the filtrate was concentrated in addition to the solvent and recrystallized from trichloromethane to give white crystals of 3-chloro-2-hydroxypropionic acid, yield52%.

References:

China University Of Geoscienceswuhan;ZHANG, Xiaojin;DAI, Yu CN106554342, 2017, A Location in patent:Paragraph 0012-0014

FullText