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 1-Dodecanethiol
112-55-0

1-Dodecanethiol synthesis

12synthesis methods
Preparation of 1-dodecanethiol: 1-Bromododecane, thiourea and 95% ethanol are heated to reflux reaction, then sodium hydroxide solution is added and heated. After the reaction is finished, cooled and left to stratify, the oil layer is the crude thiol. The crude product is washed with water, dried, distilled, and distilled under reduced pressure, which is 1-dodecanethiol.
-

Yield:112-55-0 244 g

Reaction Conditions:

with sodium hydrogensulfide;tetrabutylammomium bromide in water;chlorobenzene at 65 - 70; for 12 h;

Steps:

5 Example 5

The second phase (445 g) is distilled to obtain n-chlorododecane (V) (143 g). 143 g of the n-chlorododecane (V), 100 g of chlorobenzene, 180 g of a 32% by weight sodium bisulfide solution in water and 4 g of tetra-butylammonium bromide are added into a 1000 ml four-necked flask with a stirrer, a thermometer and a condenser. At a temperature in the range of from 65 to 70° C., the mixture is reacted for 12 h. The mixture is separated into an aqueous layer and an organic layer. The organic layer is n-dodecanethiol (III) (244 g).

References:

US2015/336910,2015,A1 Location in patent:Paragraph 0277

1-Dodecanethiol Related Search:

田东县| 始兴县| 炉霍县| 文成县| 卓尼县| 正定县| 油尖旺区| 沂源县| 惠来县| 高台县| 米泉市| 赫章县| 大方县| 鸡东县| 金寨县| 凌源市| 尚义县| 灵台县| 阿拉善盟| 云和县| 柏乡县| 尉氏县| 交口县| 孝感市| 吉隆县| 昌图县| 通河县| 思南县| 静乐县| 庆安县| 姜堰市| 阿荣旗| 上高县| 洞头县| 土默特左旗| 绿春县| 银川市| 公主岭市| 灵石县| 阜城县| 晋宁县|