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 Sulfisoxazole
127-69-5

Sulfisoxazole synthesis

13synthesis methods
Sulfisoxazole, N1 -(3,4-dimethyl-5-isoxazolyl)sulfanilamide (33.1.19), is synthesized by reacting 4-acetylaminobenzenesulfonyl chloride with 5-amino-3, 4-dimethylisoxazol (33.1.17), which is in turn synthesized by heterocyclization of 2-methylacetylacetonitrile with hydroxylamine, and subsequent acidic hydrolysis (hydrochloric acid) of the protective acetyl group in the resulting product (33.1.18).

-

Yield:127-69-5 69%

Reaction Conditions:

with acetic acid;zinc in acetonitrile at 0 - 20;

Steps:

4.2.2. 4-Amino-N-(3,4-dimethylisoxazol-5-yl)benzenesulfonamide (14)

Nitro compound 13 (0.71 g, 2.40 mmol) was dissolved in a mixture of AcOH:CH3CN (20 mL, 1:1, v/v) and cooled to 0 °C. Zn powder (1.5 g) was added in small portions over a period of 10 min. After stirring the reaction for 3 h at rt, reaction mixture was filtered off and filtrate was evaporated to dryness. The resulting residue was purified by silica gel column chromatography (0-10% MeOH in EtOAc, v/v) to afford amine 14 (0.65 g, 69%) as a solid.

References:

Costanzi, Stefano;Santhosh Kumar;Balasubramanian, Ramachandran;Kendall Harden;Jacobson, Kenneth A. [Bioorganic and Medicinal Chemistry,2012,vol. 20,# 17,p. 5254 - 5261]

Sulfisoxazole Related Search:

上饶市| 乐平市| 盐源县| 和硕县| 房山区| 广东省| 乡城县| 凤城市| 阿坝| 蒙阴县| 麦盖提县| 昌江| 平原县| 元谋县| 延边| 彭水| 苏尼特左旗| 海安县| 当阳市| 湘乡市| 临澧县| 金溪县| 平邑县| 嵊泗县| 普陀区| 仙游县| 张家港市| 丰县| 静海县| 六盘水市| 聂荣县| 横峰县| 山丹县| 宁蒗| 上林县| 沭阳县| 拉萨市| 和平区| 乐至县| 克拉玛依市| 马山县|