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136819-91-5

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136819-91-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 136819-91-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,6,8,1 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 136819-91:
(8*1)+(7*3)+(6*6)+(5*8)+(4*1)+(3*9)+(2*9)+(1*1)=155
155 % 10 = 5
So 136819-91-5 is a valid CAS Registry Number.

136819-91-5Downstream Products

136819-91-5Relevant articles and documents

Annelation reactions of enaminones with ethyl acetoacetate. Studies on the β-carbonyl compounds connected with β-polyketides. XI

Takeuchi,Handa,Koyama,Kamata,Goto,Tobinaga

, p. 1655 - 1658 (2007/10/02)

Though condensation at either the carbonyl oxygen or the unsaturated carbon adjacent to nitrogen of enaminones can occur in the reaction with the active methylene of ethyl acetoacetate, the results obtained in the condensation reactions of the enaminones

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