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42216-75-1

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42216-75-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 42216-75-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,2,1 and 6 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 42216-75:
(7*4)+(6*2)+(5*2)+(4*1)+(3*6)+(2*7)+(1*5)=91
91 % 10 = 1
So 42216-75-1 is a valid CAS Registry Number.

42216-75-1Relevant articles and documents

Reaction of o-nitrophenylhydrazines with 2,5-dimethoxytetrahydrofuran

Viswanathan, N.,Sidheye, A. R.,Gawad, D. H.

, p. 182 - 183 (2007/10/02)

Reactions of 2-nitrophenylhydrazine and 2,4-dinitrophenylhydrazine with 2,5-dimethoxytetrahydrofuran yield the bis-hydrazones (1a) and (1b) respectively.On further heating with acid, they yield the pyrroles (2a) and (2b) respectively.Excess of 2,5-dimethoxytetrahydrofuran leads to the indoles (3a) and (3b) and the carbazoles (4a) and (4b) respectively.

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