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204253-76-9

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204253-76-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 204253-76-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,4,2,5 and 3 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 204253-76:
(8*2)+(7*0)+(6*4)+(5*2)+(4*5)+(3*3)+(2*7)+(1*6)=99
99 % 10 = 9
So 204253-76-9 is a valid CAS Registry Number.

204253-76-9Upstream product

204253-76-9Downstream Products

204253-76-9Relevant articles and documents

New Synthesis of Fused Pyrimidine Derivatives via ortho-(Isocyanomethyl)nitroaromatic Compounds

Ostrowski, Stanislaw

, p. 180 - 187 (2007/10/03)

An efficient synthesis of functionalized fused pyrimidine derivatives from the respective ortho-(isocyanomethyl)nitroarenes is described.Hydrolysis of the isocyano group in the title isonitriles followed by catalytic reduction of the nitro group and subsequent cyclocondensation of the diamine formed with orthoesters leads to the final products.

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