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133343-74-5

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133343-74-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 133343-74-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,3,4 and 3 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 133343-74:
(8*1)+(7*3)+(6*3)+(5*3)+(4*4)+(3*3)+(2*7)+(1*4)=105
105 % 10 = 5
So 133343-74-5 is a valid CAS Registry Number.

133343-74-5Relevant articles and documents

SYNTHESIS OF EXTENDED ACYCLIC AZATHIENES WITH AROMATIC SUBSTITUENTS. III. PHTHALIMIDO GROUP AS THE LEAVING GROUP

Zibarev, A. V.,Miller, A. O.,Shakirov, M. M.,Furin, G. G.

, p. 864 - 872 (2007/10/02)

The use of the phthalimido group as the leaving group makes it possible to obtain asymmetric 1,7-diaryl-1,3,5,7-tetraaza-2,4,6-trithia-1,2,5,6-heptatetraenes, which are not obtainable by the previously known methods.Cesium fluoride in acetonitrile increases the nucleophilicity of the nitrogen atom of the N-trimethylsilyl derivatives of acyclic azathienes and phthalimide.In acetonitrile solution a spontaneous shortening of the sulfur-nitrogen chain of 1,7-bis(trimethylsilyl)-1,3,5,7-tetraaza-2,4,6-trithia-1,2,5,6-heptatetraene takes place.

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