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 Terephthalaldehyde
623-27-8

Terephthalaldehyde synthesis

13synthesis methods
Using p-xylene, carbon tetrachloride, azodiisobutyronitrile and chlorine as raw materials and solvents, chlorination to obtain benzyl chloride, and then oxidized under the catalytic effect of nitric acid and zinc nitrate, the addition of zinc nitrate impr
-

Yield:623-27-8 99%

Reaction Conditions:

with 1-methyl-1H-imidazole;copper(I) oxide;2,2,6,6-Tetramethyl-1-piperidinyloxy free radical in acetonitrile at 25; for 24 h;

Steps:

8 Example 8

In a 25 mL reaction flask,Add cuprous oxide (17.9mg, 0.125mmol),Followed by addition of N-methylimidazole (20.5mg, 0.25mmol), TEMPO (39.1mg, 0.25mmol)And 1,4-benzenedimethanol (690.8 mg, 5 mmol),5 mL of acetonitrile.Stir vigorously in air at 25 ° C for 24 h.After the 24h reaction stopped,Pipette 0.2 mL of the reaction solution,Then use a acetonitrile to make a volume in a 5 mL volumetric flask.Filtration using an organic microfiltration membrane,Pipette 0.2 μL of the filtered solution into the sample.The product was analyzed by gas chromatography-mass spectrometry.1,4-benzenedialdehyde yield 99%,Gas phase analysis was 99% pure.

References:

CN108997095,2018,A Location in patent:Paragraph 0031; 0032; 0050

Terephthalaldehyde Related Search:

邻水| 铜山县| 霸州市| 卢氏县| 嫩江县| 呼和浩特市| 青岛市| 富锦市| 富阳市| 嘉峪关市| 拉萨市| 海南省| 齐河县| 台南市| 蓬溪县| 洪湖市| 锦屏县| 阿鲁科尔沁旗| 安乡县| 兴业县| 德令哈市| 安庆市| 邵阳县| 重庆市| 苗栗市| 云林县| 林西县| 会昌县| 瑞昌市| 安徽省| 上栗县| 临城县| 曲松县| 揭阳市| 寻乌县| 图们市| 博罗县| 宁武县| 手游| 璧山县| 手机|