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73873-13-9

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73873-13-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 73873-13-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,3,8,7 and 3 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 73873-13:
(7*7)+(6*3)+(5*8)+(4*7)+(3*3)+(2*1)+(1*3)=149
149 % 10 = 9
So 73873-13-9 is a valid CAS Registry Number.

73873-13-9Relevant articles and documents

A facile and convenient synthesis of 1,2,3,6-tetrahydropyridazines using azodicarboxylates under lanthanum triflate catalysis

Curini, Massimo,Epifano, Francesco,Marcotullio, Maria Carla,Rosati, Ornelio

, p. 1599 - 1604 (2001)

The hetero-Diels-Alder reaction catalyzed by lanthanum triflate hydrate using diethyl azodicarboxylate as dienophile, yielding differently substituted 1,2,3,6-tetrahydropyridazines, is described.

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