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87840-67-3

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87840-67-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 87840-67-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,8,4 and 0 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 87840-67:
(7*8)+(6*7)+(5*8)+(4*4)+(3*0)+(2*6)+(1*7)=173
173 % 10 = 3
So 87840-67-3 is a valid CAS Registry Number.

87840-67-3Relevant articles and documents

THE REARRANGEMENT OF ORTHO-NITROBENZYLIDENEMALONATE DERIVATIVES IN THEIR REACTIONS WITH THIOLS

Kinastowski, Stefan,Kaczmarek, Elzbieta,Wnuk, Stanislaw

, p. 595 - 605 (2007/10/02)

The rearrangement of 2,4-dinitro- and 2,4,6-trinitrobenzylidenemalonates in reaction with thiols, both in or without the presence of alcohols or amines has been found to afford various 2-amino-4-nitro- and 2-amino-4,6-dinitrobenzoic acid derivatives, i.e.

A Convenient One-Step Synthesis of Ethyl 2-amino-4-nitrobenzoate and Analogues by Rearrangement of 2,4-Dinitrobenzylidenemalonates

Kinastowski, Stefan,Wnuk, Stanislaw

, p. 654 - 659 (2007/10/02)

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