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23893-31-4

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23893-31-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 23893-31-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,8,9 and 3 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 23893-31:
(7*2)+(6*3)+(5*8)+(4*9)+(3*3)+(2*3)+(1*1)=124
124 % 10 = 4
So 23893-31-4 is a valid CAS Registry Number.

23893-31-4Relevant articles and documents

Etude cinetique de l'ouverture thermique de la liaison C-C d'aziridines et d'epoxydes dipoles-1,3 potentiels: I. Methode d'etude experimentale

Derdour, Aicha,Texier, Fernand

, p. 2245 - 2252 (2007/10/02)

The thermolysis of the 2-cyanoaziridines (1), 2-alkoxycarbonylaziridines (2), 2-arylaziridines (3), and 2,2-dicyano-3-aryloxiranes (4) leads to a rupture of the carbon-carbon bond yielding an azomethine ylide and the ylide of a carbonyl.The reaction of these ylides of azomethine with methyl acetylene dicarboxylate (MADC) leads to the formation of a 3-pyroline, which is transformed, according to the substituants, to a 2-pyrroline or to pyrrole.The addition of the ylides of carbonyl leads to the formation of dihydrofurans.Through the kinetic treatment of the addition of these heterocyclic compounds (1 to 4) to MADC, it is possible to determine the rate constants for the opening of the C-C bond(k1).In the case of the aziridines 1, the rates have been determined by ir while hplc has been used in the other cases.Relative to the heterocyclic compounds, the order of the experimental rate constants (kex) is always equal to one.In the cases of the N-cyclohexyl-2-cyano-3-alkylaziridines and of the N-cyclohexyl-2-carbomethoxy-3-phenylaziridine, kex varies with the concentration of MADC and this implies that the rate constants for the cycloaddition of the ylide of azomethyne and its reclosing to give aziridine are similar.In the other cases, kex is independent of the concentration of MADC and this implies that the heterocyclic compounds are slowly transformed into 1,3-dipoles, followed by a rapid cycloaddition, kex ca. k1.

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