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 N-TETRATRIACONTANE
14167-59-0

N-TETRATRIACONTANE synthesis

8synthesis methods

Synthesis of n-tertetracosane can be coupled method, can also be used to grafting method, but electrolytic synthesis of n-tertetracosane has not been reported. Electrolytic synthesis is a safe and convenient, easy to operate, high efficiency and low en

-

Yield:14167-59-0 37.5%

Reaction Conditions:

with sodium methylate in methanol at 40 - 60;Product distribution / selectivity;Electrolysis;

Steps:

1; 3
Example 1Electrocoupling of Long-chain Fatty AcidsAbout 3.0 to about 4.0 mmol of fatty acid was dissolved in methanol, followed by neutralization with about 0.3 to about 0.6 mL of 1M sodium methoxide. A potentiostat/galvanostat with a 100-V maximum compliance voltage (Princeton Applied Research Model 173) maintained a constant current between the platinum electrodes (1.5 cm×1.5 cm and 2.5 cm×1.0 cm, spaced <0.5 cm apart). The electrolysis was carried out in a water-jacketed cell to maintain a constant temperature, which is generally set at a temperature between about 40° C. and about 60° C. A magnetic stir bar was used to agitate the reaction mixture. When an electrical charge equivalent to 1.3 Faradays per mole of the starting acid at the specified current density (generally between 0.05 and 0.12 A cm-2, or about 0.18-0.63 A) passed through the reaction mixture, the electrolysis was halted. The reaction mixture was acidified with a few drops of concentrated HCl, the addition of which converted methoxide to methanol and protonated carboxylate ions. Following evaporation of methanol, the crude product was dissolved in 50 mL of hexanes, transferred to a 125 mL separatory funnel, and washed with three 75 mL volumes of water at 60° C.Table 1 shows the coupling product obtained from corresponding fatty acids.; Example 3Synthesis of n-tetratriacontane (12)Compound 12 was synthesized according to the method of Example 1. Table 3 summarizes the yield and current efficiency for the conversion of stearic acid (4) to n-tetratriacontante. The yields are lower than those obtained for the preparation of (11) above. The maximum yield (50%) was obtained under the following conditions: at 60° C. and 0.45 A cm-2, and 40° C. and 0.23 A cm-2.

References:

Archer-Daniels-Midland Company US7582777, 2009, B2 Location in patent:Page/Page column 18-19

FullText

N-TETRATRIACONTANE Related Search:

芒康县| 浮梁县| 龙里县| 开江县| 古蔺县| 五原县| 独山县| 许昌县| 乐平市| 岑巩县| 清水县| 彭山县| 贡觉县| 墨玉县| 延安市| 阳西县| 鹤岗市| 绥江县| 庆元县| 平利县| 达拉特旗| 土默特左旗| 宕昌县| 东明县| 静海县| 印江| 麻城市| 无极县| 河东区| 西吉县| 迭部县| 郸城县| 遂平县| 侯马市| 沐川县| 叙永县| 大港区| 若尔盖县| 南陵县| 永宁县| 镇康县|