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137999-47-4

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137999-47-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 137999-47-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,9,9 and 9 respectively; the second part has 2 digits, 4 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 137999-47:
(8*1)+(7*3)+(6*7)+(5*9)+(4*9)+(3*9)+(2*4)+(1*7)=194
194 % 10 = 4
So 137999-47-4 is a valid CAS Registry Number.

137999-47-4Relevant articles and documents

NEW METHOD FOR STUDYING THE REACTIVITIES OF α-DIAZO IMINES. INVESTIGATION OF THE CYCLIZATION OF N-SUBSTITUTED 2-DIAZOACETAMIDINES TO 1,2,3-TRIAZOLES

Dankova, E. F.,Bakulev, V. A.,Krut'ko, D. P.

, p. 607 - 613 (2007/10/02)

N-Substituted diazoacetamidines were generated in the reaction of N-substituted acetamidines with benzenesulfonyl azide.It is shown that their cyclization to isomeric 1,2,3-triazole characterizes the reactivities of α-diazo imines.The synthesis of 5-amino

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