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745076-33-9

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745076-33-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 745076-33-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,4,5,0,7 and 6 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 745076-33:
(8*7)+(7*4)+(6*5)+(5*0)+(4*7)+(3*6)+(2*3)+(1*3)=169
169 % 10 = 9
So 745076-33-9 is a valid CAS Registry Number.

745076-33-9Relevant articles and documents

Syntheses of new unsymmetrical and symmetrical diaryl-sulphides and diarylsulphones containing thiazolinyl and thiazolidinonyl moieties using 4,4′-diacetyldiphenylsulphide

Abbady,Abdel-Hafez,Kandeel,Abdel-Monem

, p. 622 - 641 (2007/10/03)

Condensation of 4,4′-diacetyldiphenyl sulphide (2) with variable amounts of thiosemicarbazide (3) in refluxing ethanol and in the presence of catalytic amounts of dry piperidine afforded only 4-acetylthiosemicarbazone- 4′-acetyldiphenyl sulphide (5). Condensation of 2 with excess semicarbazide hydrochloride (4) in the presence of fused sodium acetate and/or piperidine yielded 4,4′-diacetylsemicarbazone diphenyl sulphide (6), whereas use of equimolar amounts of 2 and 4 afforded 4-acetyl-semicarbazone- 4′-acetyldiphenyl sulphide (7). 4-Acetylsemicarbazone-4′- acetylthiosemicarbazone diphenyl sulphide (8) was also obtained via two different routes. The effect of tautomeric structure 5d is discussed. 4-(4″-phenyl-Δ3-thiazoline-2″-acetylazino) -4′-acetyldiphenyl sulphide (9), 4-(5″-carboxyethyl-4″- thiazolidinone-2″-acetylazino)-4′-acetyldiphenyl sulphide (10), 4-(4″-thiazolidinone-2′-acetylazino)-4′-acetyldiphenyl sulphide (11) and 4-(4″-methyl-Δ3-thiazoline-2″- acetylazino)-4′-acetyldiphenyl sulphide (12) were prepared by interaction of 5 with phenacylbromide, bromodiethylmalonate, chloro ethylacetate and chloroacetone, respectively. Sulphides 9-12 were easily condensed with 3 to afford the corresponding 4-(heterocyclic moiety-2″-acetylazino)-4′- acetylthiosemicarbazone diphenyl sulphides 23-26. Oxidation of the prepared sulphides 5-7, 9-12, 23 and 25-26 using H2O2/glacial AcOH mixtures yielded only 4,4′-diacetyldiphenyl sulphone (13) as the main product in every case, besides 3 and 4 in certain cases. Unsymmetrical and symmetrical sulphones 14-22 were obtained starting from 13. The structures of the synthesized compounds are based on IR, 1H-NMR, 13C-NMR and mass spectral data. A theoretical study on some of the prepared compounds using molecular modeling was carried out.

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