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!

15371-15-0

CHEMBRDG-BB 4023079 synthesis

10synthesis methods
-

Yield:15371-15-0 93%

Reaction Conditions:

with potassium carbonate in N-methyl-acetamide;water;

Steps:

15 Synthesis of (R)-3,7-Dimethyl-1-(5-hydroxyhexyl)-8-N-methylaminoxanthine (CT12481)

Example 15 Synthesis of (R)-3,7-Dimethyl-1-(5-hydroxyhexyl)-8-N-methylaminoxanthine (CT12481) To a stirring suspension of 8-bromo-3-methylxanthine (prepared as described above for CT12440) (12.25 g, 50.0 mmol) and potassium carbonate (8.62 g, 62.5 mmol) in dimethylformamide (150 ml) was added methyl iodide (7.81 g, 55.0 mmol). After stirring overnight at room temperature, the mixture was poured into ice cold water (400 ml) and stirred at 0-5° C. for 1 hour. The precipitate was filtered, rinsed with water (5*25 ml) and dried under vacuum to provide 8-bromo-3,7-dimethylxanthine (12.10 g, 93% yield) as a beige solid.

References:

US2002/28823,2002,A1

CHEMBRDG-BB 4023079 Related Search: