2,4-Dibromo-3-methylthiophene

2,4-Dibromo-3-methylthiophene Struktur
53119-66-7
CAS-Nr.
53119-66-7
Englisch Name:
2,4-Dibromo-3-methylthiophene
Synonyma:
2,4-Dibromo-3-methylthiophene
CBNumber:
CB32332076
Summenformel:
C5H4Br2S
Molgewicht:
255.95826
MOL-Datei:
53119-66-7.mol

2,4-Dibromo-3-methylthiophene Eigenschaften

Sicherheit

2,4-Dibromo-3-methylthiophene Chemische Eigenschaften,Einsatz,Produktion Methoden

synthetische

Synthesis of 2,4-Dibromo-3-methylthiophene: A mixture of 3-methylthiphene (50.0 g, 0.509 mol), glacial AcOH (400 mL) and NaOAc (132 g, 1.60 mol) was stirred and heated to 60°C. Bromine (260 g, 1.63 mol) was then added dropwise at such a rate that kept the temperature below 85°C . The mixture was heated at 85°C for 5 h to complete the conversion to 2,4,5-tribromo-3-methylthiophene, then water (85 g) was added and the reaction temperature was dropped to 60°C. Zinc dust (48.1 g, 0.73 mol) was carefully added in 5-10 g portions so as to keep the temperature below 85°C. The mixture was heated to 100°C for 8 h, then cooled to 25°C. Water (350 mL) and hexanes (500 mL) were then added. The mixture was stirred for 30 min, the organic layer was separated, washed with water (150 mL), then saturated NaHCO3 solution (150 mL), then concentrated to give an orange oil. This oil was distilled (b.p. 80°C @ 0.3 mm Hg) through a 6” jacketed Vigreux column to give 107 g (82% wt.) of a yellow oil which slowly solidified. GC area % analysis showed the product to be a mixture of 2,4-dibromo-3-methylthiophene (89%), 4,5-dibromo-3-methylthiophene (9%), and 4-bromo-3-methylthiophene (2%).

2,4-Dibromo-3-methylthiophene Upstream-Materialien And Downstream Produkte

Upstream-Materialien

Downstream Produkte


2,4-Dibromo-3-methylthiophene Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

Global( 5)Lieferanten
Firmenname Telefon E-Mail Land Produktkatalog Edge Rate
Shanghai Haohong Pharmaceutical Co., Ltd. 400-400-8210725 4008210725
malulu@leyan.com China 40036 58
Hangzhou Yijing Technology Co., Ltd 15068777134
1289372011@qq.com China 668 58
Zhuhai Aobokai Biomedical Technology Co., Ltd. 400-0628126 15976997964;
sales-team@aobchem.com.cn China 50493 58
Beijing Famozi Pharmaceutical Technology Co., Ltd 13331045123
2728639891@qq.com China 7919 58
Woerjiming (Beijing) Technology Development Institute 18610294897
414752910@qq.com China 1282 58

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