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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 H?ndler.

Global( 8)Lieferanten
Firmenname Telefon E-Mail Land Produktkatalog Edge Rate
Jinan Cen Ben Medical Technology Co., Ltd 14793566
info@cenpharm.com China 791 58
Shanghai Haohong Pharmaceutical Co., Ltd. 400-8210725 4008210725
malulu@leyan.com China 39988 58
Zhengzhou Converging Chemical Co. LTD 0371-53399770 18037166334
3857571523@qq.com China 6774 58
Zhuhai Aobokai Biomedical Technology Co., Ltd. 400-0628126 15697568807;
sales-team@aobchem.com.cn China 9999 58
Beijing Famozi Pharmaceutical Technology Co., Ltd 15811073878
2559355526@qq.com China 9997 58
Woerjiming (Beijing) Technology Development Institute 18610294897
414752910@qq.com China 1386 58
Biosynth Biological Technology (Suzhou) Co Ltd --
sales@biosynth.com China 6051 58
Hubei Rhema Reference Materials Technology Co., Ltd. 15787879035 15787875101
ydw9035@rmastandards.com China 9973 58

  • 2,4-Dibromo-3-methylthiophene
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