天堂网亚洲,天天操天天搞,91视频高清,菠萝蜜视频在线观看入口,美女视频性感美女视频,95丝袜美女视频国产,超高清美女视频图片

Welcome to chemicalbook!
Chinese English Japanese Germany Korea
400-158-6606
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 Melatonine
73-31-4

Melatonine synthesis

12synthesis methods
-

Yield:73-31-4 98.6%

Reaction Conditions:

at 305; for 4 h;Temperature;

Steps:

1.5; 2.5; 3.5; 4.5; 5.5

(5) 50g 5-methoxytryptamine and 65g acetic anhydride were added to the reactor, stirred at 305°C for 4h, and the reaction progress was monitored by TLC; after the reaction, 300mL of water was added to the reactor, and then 20% sodium carbonate was used The pH value of the solution is adjusted to 6.8, and a solid melatonin appears. The solid melatonin is collected by filtration, and the collected solid melatonin is dried in an oven at 60° C. to obtain the final product melatonin. The yield was 98.6% and the purity was 99.3%.

References:

CN114516826,2022,A Location in patent:Paragraph 0049; 0054-0055; 0060-0061; 0066-0067; 0072.......

Melatonine Related Search: