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-Bromooctadecane
112-89-0

1-Bromooctadecane synthesis

10synthesis methods
1-Bromooctadecane is synthesized by the reaction of stearyl alcohol with hydrogen bromide. The alcohol is heated to 100°C, dry hydrogen bromide is introduced, and the reaction temperature is maintained at 100-120°C until the solution no longer absorbs hydrogen bromide. The bromide is layered, the organic phase is washed with concentrated sulfuric acid, the bromide after the acid solution is separated and mixed with an equal volume of 90% methanol, washed with ammonia to make the bromide alkaline, then washed with 90% methanol, and anhydrous Dry calcium chloride. Finally, vacuum distillation, collecting 209-211 ℃ (1.33kPa) fraction is 1-bromooctadecane, and the yield is 90%.
-

Yield:-

Steps:

22 N-palmitoyl-S[2(R,S)-palmitoyloxyeisocanyl]-(L)-cysteine

N-palmitoyl-(L)-cysteine is reacted in an analogous manner with 1-bromo-octadecane and N-palmitoyl-S-octadecyl-(L)-cysteine of melting point 90°-92° is thus obtained; [α]D20 =+13° (c=1.33 chloroform).

References:

US4439425,1984,A

1-Bromooctadecane Related Search:

普陀区| 温泉县| 北海市| 肇东市| 民勤县| 新闻| 海兴县| 福海县| 旬邑县| 高州市| 开鲁县| 武城县| 新绛县| 中方县| 如东县| 禹州市| 望谟县| 新竹县| 滦平县| 武川县| 太仆寺旗| 天柱县| 连州市| 留坝县| 靖州| 从江县| 盐源县| 罗甸县| 怀集县| 闽清县| 齐河县| 托克逊县| 东丽区| 吉首市| 新营市| 鹿邑县| 昔阳县| 从化市| 图木舒克市| 尉犁县| 朝阳区|