873-40-5 Usage
Uses
Used in Pharmaceutical Industry:
Pyrazine,2,3,5-trichlorois used as a chemical intermediate for the synthesis of various pharmaceutical compounds. Its reactivity allows for the creation of a wide range of medicinal agents, contributing to the development of new treatments and therapies.
Used in Dye Industry:
In the dye industry, Pyrazine,2,3,5-trichloroserves as an intermediate in the production of different types of dyes. Its chemical properties enable the creation of dyes with specific color characteristics and stability, catering to various applications in textiles, plastics, and other materials.
Used in Pesticide Industry:
Pyrazine,2,3,5-trichlorois utilized as an intermediate in the manufacturing of pesticides. Its reactivity and ability to form stable compounds make it a valuable component in developing effective and long-lasting pest control products, ensuring agricultural productivity and crop protection.
Check Digit Verification of cas no
The CAS Registry Mumber 873-40-5 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 8,7 and 3 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 873-40:
(5*8)+(4*7)+(3*3)+(2*4)+(1*0)=85
85 % 10 = 5
So 873-40-5 is a valid CAS Registry Number.
InChI:InChI=1/C4HCl3N2/c5-2-1-8-3(6)4(7)9-2/h1H
873-40-5Relevant academic research and scientific papers
Favipiravir intermediate 3, 6-dichloro-2-cyanopyrazine synthesis process
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Paragraph 0014; 0043-0044; 0046-0059, (2021/07/17)
The present invention relates to a favipiravir intermediate 3, 6-dichloro-2-cyanopyrazine synthesis process, which is characterized in that the synthesis route is as follows as described in the specification. The cheap 2-chloropyrazine is used as the raw material, the product 3, 6-dichloro-2-cyanopyrazine can be obtained only through two-step reaction, the total yield is 55% or above, all the used reagents can be common reagents which can be purchased commercially, the production cost is reduced, and a synthesis process for large-scale industrial production of the 3, 6-dichloro-2-cyanopyrazine is achieved. According to the method disclosed by the invention, the synthesis process conditions are optimized, and particularly, the catalyst and the cocatalyst in the step (2) are selected, so that the yield and the purity of the product are further improved.
