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 1,3-DIMETHYLPSEUDOURIDINE
64272-68-0

1,3-DIMETHYLPSEUDOURIDINE synthesis

6synthesis methods
-

Yield:64272-68-0 75.4%

Reaction Conditions:

in dimethyl sulfoxide at 110; for 1 h;

Steps:

10; 19

yn es s o , - me y pseu our ne : suspens on o pseu our ne . g, mmol) in Ν,Ν-dimethylformamide dimethyl acetal (10 ml_) was refluxed at 1 1 0 °C for 1 h until a ar solution was obtained. TLC (DCM-MeOH = 9: 1 ) indicated the reaction was almost completed. e solution was concentrated in vacuo to give syrup which was triturated with a small amount of thanol to give 640 mg solid product. The filtrate was concentrated and then further purified by flash omatography on a silica gel column using DCM-MeOH 30:1 to 10:1 gradient eluent to give ditional 200 mg product resulting in the total yield of 75.4%.

References:

WO2015/196128,2015,A2 Location in patent:Page/Page column 592

1,3-DIMETHYLPSEUDOURIDINE Related Search:

绥滨县| 钦州市| 麟游县| 同江市| 山东省| 青岛市| 利辛县| 长宁区| 法库县| 定日县| 金沙县| 谢通门县| 任丘市| 彩票| 思南县| 天等县| 晋中市| 宁乡县| 阜康市| 永安市| 北票市| 鲁山县| 台南县| 醴陵市| 雷波县| 石河子市| 灌南县| 曲周县| 耒阳市| 乃东县| 厦门市| 榕江县| 台中县| 定南县| 永善县| 堆龙德庆县| 新民市| 托克托县| 广昌县| 德惠市| 武邑县|