一二三四区视频,亚洲少妇熟女色,日本久热无码视频网,欧美国产日韩大尺度,亚洲a视频,久久少妇一区二区,日韩999无码视频,刺激久久久久久久,啊啊啊啊不要啊在线

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 (S)-[2-(Benzyloxy)propylidene]hydrazinecarboxaldehyde
170985-84-9

(S)-[2-(Benzyloxy)propylidene]hydrazinecarboxaldehyde synthesis

6synthesis methods
-

Yield: 86%

Reaction Conditions:

in methanol;toluene at 0 - 30; for 3 h;Green chemistry;

Steps:

1.3-3.3
3,9.31 g (0.15 mol) of formylhydrazine was dissolved in 150 ml of methanol, and after cooling to 0 ° C, 150 ml of a toluene solution in which 29.56 g (0.18 mol) of (S)-2-benzyloxypropanal was dissolved was added.After slowly raising the temperature to 25-30 ° C, the reaction was stirred at this temperature for 3 hours;After completion of the reaction, the solvent was removed by rotary evaporation, and 80 ml of ethyl acetate was added to the residue, and the mixture was stirred at 25-30 ° C for 2 hours, and the precipitate was filtered off. After the mother liquid was removed from ethyl acetate, 80 ml of petroleum ether was added to the mixture, 25-30 ° C After stirring for 2 hours, the precipitate was filtered off and dried to give the product (S)-N'-(2-benzyloxypropylidene)formylhydrazide.31.90 g (0.155 mol), yield 86%.

References:

Ningbo Xinji New Materials Technology Co., Ltd.;Shao Ning;Wang Chunchun CN109651187, 2019, A Location in patent:Paragraph 0034; 0037-0040; 0041; 0044; 0046; 0049

(S)-[2-(Benzyloxy)propylidene]hydrazinecarboxaldehyde Related Search:

嵊泗县| 长沙市| 吴江市| 天峨县| 海淀区| 澄城县| 遵义市| 石楼县| 广汉市| 金川县| 阿巴嘎旗| 金昌市| 通渭县| 北辰区| 库尔勒市| 金川县| 东方市| 东乌珠穆沁旗| 项城市| 金坛市| 莱芜市| 张掖市| 应城市| 红安县| 彭泽县| 绍兴市| 苏尼特左旗| 碌曲县| 白河县| 桂阳县| 察雅县| 林州市| 平南县| 洛扎县| 大洼县| 定结县| 宜阳县| 重庆市| 芜湖县| 白城市| 清远市|