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634603-35-3

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634603-35-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 634603-35-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,4,6,0 and 3 respectively; the second part has 2 digits, 3 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 634603-35:
(8*6)+(7*3)+(6*4)+(5*6)+(4*0)+(3*3)+(2*3)+(1*5)=143
143 % 10 = 3
So 634603-35-3 is a valid CAS Registry Number.

634603-35-3Relevant articles and documents

Thermolysis of geminal diazides: Reagent-free synthesis of 3-hydroxypyridines

Erhardt, Hellmuth,Kunz, Kevin A.,Kirsch, Stefan F.

supporting information, p. 178 - 181 (2017/11/27)

An operationally simple protocol for the rapid and efficient construction of highly substituted 3-hydroxypyridines is presented. The thermally induced cyclization of easily constructed geminal diazides derived from β- ketoesters having an additional olefin moiety affords the title compounds in yields up to 97% under reagent-free conditions. The new method allows for the synthesis of preparative quantities of material. Additionally, the synthetic utility of the pyridine products for the synthesis of valuable heterocycles is described.

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