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5-phenyl-2-phenylthiopyrazine-3-carbonitrile is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

208993-73-1

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208993-73-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 208993-73-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,8,9,9 and 3 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 208993-73:
(8*2)+(7*0)+(6*8)+(5*9)+(4*9)+(3*3)+(2*7)+(1*3)=171
171 % 10 = 1
So 208993-73-1 is a valid CAS Registry Number.

208993-73-1Upstream product

208993-73-1Relevant academic research and scientific papers

A regioselective synthesis of methyl 7-amino-3-phenylthieno-[2,3-b]pyrazine-6-carboxylate

Zhang,Haight,Ford,Parekh

, p. 725 - 730 (2001)

A practical synthesis of methyl 7-amino-3-phenylthieno [2,3-b]pyrazine-6-carboxylate (1) has been achieved via a regioselective synthesis of 3-cyano-5-phenyl-3-phenylthiopyrazine (5a), by condensing 1,1-diethoxyacetophenone with 2,3-diamino-3-phenylthioac

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