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20576-92-5

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20576-92-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20576-92-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,5,7 and 6 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 20576-92:
(7*2)+(6*0)+(5*5)+(4*7)+(3*6)+(2*9)+(1*2)=105
105 % 10 = 5
So 20576-92-5 is a valid CAS Registry Number.

20576-92-5Relevant articles and documents

Novel synthesis of highly functionalized pyrazolone systems via rearrangement of 5-phenyl-1-oxa-5,6-diazaspiro[2.4]heptane-4,7-diones

Metwally,Mohamed,Moustafa,El-Ossaily

experimental part, p. 1344 - 1353 (2011/10/17)

Epoxidation of 4-alkylidene(arylidene)-1-phenyl-3,5-pyrazolidinediones using alkaline hydrogen peroxide gave the corresponding 5-phenyl-1-oxa-5,6- diazaspiro[2.4]heptane-4,7-dione derivatives. Their reaction with nucleophilic reagents was investigated. The resulting products depend on the type of the diazaspiro compound and/or the nucleophile used.

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