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 2'-C-Methyl-, 2',3',5'-tribenzoateuridine
23643-36-9

2'-C-Methyl-, 2',3',5'-tribenzoateuridine synthesis

4synthesis methods
-

Yield:23643-36-9 90.3%

Reaction Conditions:

with N,O-bis-(trimethylsilyl)-acetamide;tin(IV) chloride in acetonitrile at 75;Temperature;

Steps:

1.4 Step 4, Synthesis of Compound Α4

50 g of compound A3, 1 lg of uracil, 26 g of N,0-bis(trimethylsilyl)acetamide and a second organic solvent were added to the reaction flask, and the second organic solvent was acetonitrile, N,0-double (three The mass ratio of methylsilylacetamide to compound 3 is 1:1, the temperature is raised to 75 ° C, and 45 g of tin tetrachloride is slowly added dropwise. After the reaction, water and alkali are added to neutralize, and dichloromethane is added for extraction. The phases were separated, the organic phase was concentrated, beaten, and filtered to obtain Compound A4 in a yield of 90.3%

References:

CN108440613,2018,A Location in patent:Paragraph 0022; 0025; 0054

2'-C-Methyl-, 2',3',5'-tribenzoateuridine Related Search: