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 5-METHOXY-2-METHYL-3-(3-SULFOPROPYL)BENZOTHIAZOLIUM INNER SALT
63149-01-9

5-METHOXY-2-METHYL-3-(3-SULFOPROPYL)BENZOTHIAZOLIUM INNER SALT synthesis

1synthesis methods
-

Yield:63149-01-9 84%

Reaction Conditions:

in toluene;Reflux;

Steps:

2.2 Synthesis of 3-(2-methyl-5-methoxybenzothiazole) propane-1-sulfonate

The synthetic route of 3-(2-methyl-5-methoxybenzothiazole) propane-1-sulfonate is shown in Scheme 1 . A 250mL circular bottom flask was taken and 2-methyl-5-methoxybenzothiazole (0.90g, 0.005mol) was measured and dissolved in toluene (20mL). After stirring for 30min, 1, 3-propanolactone (1.00g, 0.008mmol) was added. The reaction mixture was refluxed overnight. The precipitate produced was filtered at room temperature and washed with acetone and ethyl acetate and eventually dried to yield the white powder (84%), namely intermediate. 1H NMR (400MHz, DMSO-d6) δ 8.25 (d, J=9.0Hz, 1H), 8.12 (s, 1H), 7.39 (d, J=6.8Hz, 1H), 4.92 (t, J=8.2Hz, 2H), 3.96 (s, 3H), 3.16 (s, 3H), 2.63 (t, J=6.2Hz, 2H), 2.22-2.09 (m, 2H).

References:

Huang, Minyan;Li, Zhongyu;Xu, Song;Zhang, Yuzhe;Zheng, Xudong;Zhou, Jintao [Inorganic Chemistry Communications,2020,vol. 117]

桦甸市| 泾川县| 东安县| 潼关县| 府谷县| 乐清市| 铁力市| 手游| 文山县| 濮阳市| 滨州市| 于都县| 虹口区| 昭苏县| 新邵县| 抚顺市| 台南市| 济阳县| 海安县| 元朗区| 长丰县| 德昌县| 万荣县| 阿拉善右旗| 东辽县| 当雄县| 乌兰察布市| 依兰县| 孙吴县| 河东区| 临沧市| 夹江县| 山东省| 龙南县| 乌拉特后旗| 五常市| 礼泉县| 肥城市| 门头沟区| 弥渡县| 青岛市|