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 Phenyl chloroformate
1885-14-9

Phenyl chloroformate synthesis

12synthesis methods
Phenyl chloroformate is synthesized by the reaction of phenol with phosgene. Phenol was dissolved in chloroform, phosgene was introduced under cooling, and the absorbed phosgene was in an equal molar ratio to phenol, and equimolar N,N-dimethylaniline was added dropwise under stirring at 5-10 °C. Then add cold water to dilute, separate the oil layer, wash with dilute hydrochloric acid and water successively. After drying with anhydrous calcium chloride, chloroform is evaporated, and then distilled under reduced pressure to collect 74-75°C (1.73kPa) fraction, which is phenyl chloroformate. The yield is about 90%.
-

Yield:1885-14-9 91.5%

Reaction Conditions:

with CoCl2 in triphenylphosphine;

Steps:

4.b Example 4

(b) A further 500 g of phenol are added to the residue, which weighs 100 g, without feeding in fresh triphenylphosphine. The reaction is carried out, as described under 4(a), with 560 g of COCl2. After a phosgenation time of 8 hours, 764 g of distilled 99.7% pure chloroformic acid phenyl ester are obtained (91.5% of the theoretical yield).

References:

US4366102,1982,A

Phenyl chloroformate Related Search:

东乡族自治县| 长岭县| 封丘县| 乌拉特后旗| 高碑店市| 邯郸县| 汪清县| 民勤县| 锡林浩特市| 无棣县| 伊金霍洛旗| 集贤县| 阿尔山市| 德令哈市| 长治市| 拉萨市| 宁强县| 南溪县| 周宁县| 白山市| 环江| 夏河县| 新干县| 河津市| 开江县| 徐汇区| 渭南市| 玉山县| 潞城市| 翁源县| 呼伦贝尔市| 舟曲县| 钟山县| 尖扎县| 浮梁县| 蒙山县| 泾川县| 昌黎县| 杭州市| 唐河县| 千阳县|