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90861-42-0

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90861-42-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 90861-42-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,8,6 and 1 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 90861-42:
(7*9)+(6*0)+(5*8)+(4*6)+(3*1)+(2*4)+(1*2)=140
140 % 10 = 0
So 90861-42-0 is a valid CAS Registry Number.

90861-42-0Relevant articles and documents

Synthesis of Hydrazone Derivatives by Reaction of Azines with Nitriles, and Their Transformation into Pyrazoles and Pyrimidones

a Jose,Gotor, Vicente

, p. 611 - 614 (2007/10/02)

Reaction of equimolar amount of saturated nitriles and azines affords hydrazone derivatives; with unsymmetrical azines the reaction is regioselective and takes place with an alkyl substituent at the end of the azines opposite to an aryl substituent.Acid catalysed cyclisation and hydrolysis of the hydrazone derivatives yields N-unsubstituted pyrazoles, whereas aluminium chloride catalysed cyclisation of the N-ethoxycarbonyl analogues affords pyrimidones.

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