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:

弥渡县| 奉化市| 神池县| 正镶白旗| 鄂温| 改则县| 广元市| 资溪县| 静乐县| 清流县| 罗江县| 大英县| 蒲城县| 锦州市| 苏尼特右旗| 鹿泉市| 壶关县| 隆尧县| 黔东| 佛教| 苍南县| 新安县| 宝丰县| 农安县| 灵石县| 枞阳县| 辽宁省| 买车| 张家川| 镇雄县| 沿河| 新津县| 四会市| 马鞍山市| 黑龙江省| 上饶市| 阿瓦提县| 高台县| 永川市| 高要市| 玛纳斯县|