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 Valienamine
38231-86-6

Valienamine synthesis

5synthesis methods
-

Yield:38231-86-6 94.7%

Reaction Conditions:

with barium(II) hydroxide in water at 70 - 80; for 3 h;

Steps:

11 Preparation of valienamine
Intermediate IV (R1 is benzyl) (30.9 g) is dissolved in 450 ml of water.94.6 g of barium hydroxide was added and the temperature was raised to 70-80 °C. After 3 hours, cool to room temperature, pass carbon dioxide gas to PH7-8, filter,The filter cake was washed with water and washed with ethyl acetate. the aqueous layer was passed through a CG-50 (NH4+, 800 ml) column, washed with water, and washed with 0.5 M ammonia water. concentrate to about 100 ml and pass through a DOWEX 1X2 (OH-, 800 ml) column.Washed, collected part of the product, concentrated, the ethanol was dried to give 16.6 g of white crystals, yield 94.7%.

References:

Changzhou Bohaiwei Pharmaceutical Technology Co., Ltd.;Liu Xiangqun;Li Qiang;Chen Xuanfu CN109111366, 2019, A Location in patent:Paragraph 0161-0163

FullText

38665-10-0 Synthesis
Validoxylamine A

38665-10-0
7 suppliers
inquiry

32780-32-8 Synthesis
Validamine

32780-32-8
197 suppliers
inquiry

Valienamine Related Search:

武乡县| 凭祥市| 彭山县| 阳高县| 宁国市| 工布江达县| 容城县| 澳门| 奈曼旗| 沛县| 威宁| 惠来县| 德惠市| 桑日县| 襄垣县| 新竹市| 泉州市| 寿光市| 寿宁县| 南昌市| 溧水县| 惠安县| 乳源| 闽侯县| 偃师市| 浮山县| 博白县| 偏关县| 尼玛县| 沂源县| 隆林| 湛江市| 沛县| 宜良县| 大名县| 高要市| 滦南县| 昂仁县| 方城县| 洪雅县| 馆陶县|