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136984-61-7

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136984-61-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 136984-61-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,6,9,8 and 4 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 136984-61:
(8*1)+(7*3)+(6*6)+(5*9)+(4*8)+(3*4)+(2*6)+(1*1)=167
167 % 10 = 7
So 136984-61-7 is a valid CAS Registry Number.

136984-61-7Relevant articles and documents

An easy access to 2-oxohydrazones via electrophilic α-p-tolylhydrazonylation of ketone enolates with tert-butyl p-tolylazo sulfide

Dell'Erba, Carlo,Novi, Marino,Petrillo, Giovanni,Tavani, Cinzia

, p. 11239 - 11248 (2007/10/02)

The title reaction conveniently furnishes, as the sole or main products, α-(p-tolylhydrazono)ketones or their N-methylderivatives (H+ or MeI quenching of the final mixture, respectively). Although the method fails with ketones having a secondary alkyl group bonded to the carbonyl, yields are otherwise more than satisfactory and particular interest is attached to the hydrazonylation of the methyl group in methyl ketones.

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