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204996-03-2

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204996-03-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 204996-03-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,4,9,9 and 6 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 204996-03:
(8*2)+(7*0)+(6*4)+(5*9)+(4*9)+(3*6)+(2*0)+(1*3)=142
142 % 10 = 2
So 204996-03-2 is a valid CAS Registry Number.

204996-03-2Relevant articles and documents

Sequential Pd(0)-catalyzed reactions for the construction of multiple substituted furans. A short synthesis of the F5 furan fatty acid

Bach, Thorsten,Krueger, Lars

, p. 1729 - 1732 (1998)

4,5-Dibromofurfural (1) undergoes a regioselective Pd(0)-catalyzed C-C bond forming reaction at its C-5 position to yield corresponding furans 3. The second bromine substituent in C-4 position can be substituted by a methyl group in a subsequent Pd(0)-catalyzed cross coupling reaction. The furan fatty acid 12 and its benzyl ester 13 were prepared in a short synthetic sequence using this method.

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