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-PROPYL-2,3,4,9-TETRAHYDRO-1H-BETA-CARBOLINE-3-CARBOXYLIC ACID
147796-05-2

1-PROPYL-2,3,4,9-TETRAHYDRO-1H-BETA-CARBOLINE-3-CARBOXYLIC ACID synthesis

2synthesis methods
-

Yield: 58%

Reaction Conditions:

with sulfuric acid in ethanol;water at 20; for 24 h;

Steps:

I; 18; II Synthesis of 1-propyl-1,2,3,4-tetrahydro-β-carboline-3-carboxylic acid (13a)
L- tryptophan (5.10g, 25mmol), water (300ml), H2SO4 (0.5M, 50 ml), n-butyraldehyde (10ml) and ethanol (100ml) were added in a 250 ml round-bottom flask, and then stirred and reacted at room temperature for 24 h. After filtration, wash with water and drying, white solids (3.75g, 58%)were obtained.

References:

Xinjiang Huashidan Pharmaceutical Research Co., Ltd. EP1634881, 2006, A1 Location in patent:Page/Page column 14; 16; 95

1-PROPYL-2,3,4,9-TETRAHYDRO-1H-BETA-CARBOLINE-3-CARBOXYLIC ACID Related Search:

华坪县| 静宁县| 独山县| 松滋市| 安平县| 葵青区| 临江市| 嵊州市| 莲花县| 德惠市| 天峻县| 樟树市| 青岛市| 饶平县| 太仓市| 昌邑市| 新源县| 波密县| 东台市| 大英县| 全椒县| 犍为县| 思茅市| 县级市| 德化县| 石泉县| 历史| 车险| 固始县| 营山县| 阜城县| 贵港市| 合山市| 平顶山市| 大港区| 垫江县| 宁安市| 桂阳县| 正镶白旗| 土默特左旗| 高淳县|