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 1,3,4-TRIMETHYL URACIL
13509-52-9

1,3,4-TRIMETHYL URACIL synthesis

11synthesis methods
-

Yield: 65%

Reaction Conditions:

with sulfuric acid;potassium iodide at 80; for 5 h;

Steps:

Reaction of 5-Iodo-1,3,6-trimethyluracil (4), 5-Bromo-1,3,6-trimethyluracil (5), or N-Bromo-5-bromo-6-hydroxymethyluracil (7) with KI in H2SO4 (5%) (General Method)
General procedure: A suspension of 4, 5, or 7 (1 mmol) and KI (0.83 g,5 mmol) in H2O (1.88 mL) at 80°C was treated dropwise with H2SO4 (98%, 0.05 mL, 1 mmol), stirred for 5 h at that temperature, cooled, treated with Na2S2O3·5H2O solution (10%), and extracted with CHCl3. The combined extracts were washed with distilled H2O, dried over Na2SO4, and evaporated to produce 6 (0.10 g, 68% yield from 4 and 0.10 g, 65% from 5).The physicochemical characteristics agreed with known data [8]. Compound 7 (0.27 g) was obtained as a mixture and a yellow amorphous powder, the main component of which was 5-bromo-6-iodomethyluracil (11).

References:

Chernikova;Spirikhin;Abdullin;Yunusov [Chemistry of Natural Compounds,2017,vol. 53,# 6,p. 1140 - 1143][Khim. Prir. Soedin.,2017,# 6,p. 968 - 971,4]

1,3,4-TRIMETHYL URACIL Related Search:

清远市| 芜湖县| 武宣县| 新绛县| 前郭尔| 凤阳县| 樟树市| 杨浦区| 昭通市| 田林县| 新营市| 南通市| 商南县| 延长县| 平湖市| 胶南市| 娱乐| 彰武县| 宣武区| 杨浦区| 河北区| 怀柔区| 庆安县| 叶城县| 嘉兴市| 桓台县| 黄梅县| 客服| 宁都县| 芒康县| 喀喇沁旗| 西和县| 安国市| 塔河县| 萍乡市| 山阳县| 二手房| 榆树市| 鹰潭市| 贵阳市| 巴东县|