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87243-12-7

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87243-12-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 87243-12-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,2,4 and 3 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 87243-12:
(7*8)+(6*7)+(5*2)+(4*4)+(3*3)+(2*1)+(1*2)=137
137 % 10 = 7
So 87243-12-7 is a valid CAS Registry Number.

87243-12-7Relevant articles and documents

REACTIONS OF 4,5-DINITROIMIDAZOLE AND 4(5)-NITROIMIDAZOLE-5(4)-SULFONIC ACID WITH NUCLEOPHILES

Mokrushin, V. S.,Belyaev, N. A.,Kolobov, M. Yu.,Fedotov, A. N.

, p. 650 - 652 (1983)

The reactions of 4,5-dinitroimidazole and 5(4)-nitroimidazole-4(5)-sulfonic acid with nucleophilic agents were studied.Mercapto-, alkoxy-, and aminonitroimidazoles were synthesized.In the reaction of dinitroimidazole with sodium alkoxides 5(4)-nitroimidazole was obtained in addition to alkoxynitroimidazoles.It is shown that in the formation of salts of the starting imidazoles with bases nucleophilic-substitution reactions take place only with "soft" reagents.

RING TRANSFORMATION REACTIONS IN 4-NITROIMIDAZOLES FOLLOWING AN ATTACK OF NUCLEOPHILES

Suwinski, Jerzy,Pawlus, Wojciech,Salwinska, Ewa,Swierczek, Krzysztof

, p. 1511 - 1520 (2007/10/02)

It was proved that 4-nitroimidazoles substituted at the nitrogen atom 1 with electron acceptor groups (aryl, arenesulfonyl, nitro) in reactions with some nucleophiles yield the products of ordinary or degenerated imidazole ring transformation (oxadiazoles, triazoles, imidazoles).

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