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14006-55-4

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14006-55-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 14006-55-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,4,0,0 and 6 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 14006-55:
(7*1)+(6*4)+(5*0)+(4*0)+(3*6)+(2*5)+(1*5)=64
64 % 10 = 4
So 14006-55-4 is a valid CAS Registry Number.

14006-55-4Downstream Products

14006-55-4Relevant articles and documents

An Effective Route to Dithieno[3,2- b:2′,3′- d ]thiophene-Based Hexaheteroacenes

Demina, Nadezhda S.,Bayankina, Polina E.,Irgashev, Roman A.,Kazin, Nikita A.,Rusinov, Gennady L.

, p. 1009 - 1013 (2021)

A series of 12 H -[1]benzo[4′′,5′′]thieno[2′′,3′′:4′,5′]thieno[2′,3′:4,5]thieno[3,2- b ]indoles were efficiently prepared in three steps starting from available benzo[ b ]thieno[2,3- d ]thiophen-3(2 H)-ones. These fused ketones were treated with the Vilsmeier reagent and hydroxylamine hydrochloride to give the corresponding 3-chlorobenzo[ b ]thieno[2,3- d ]thiophene-2-carbonitriles, which then reacted with methyl sulfanylacetate to form methyl 3-aminobenzo[4′,5′]thieno[2′,3′:4,5]thieno[3,2- b ]thiophene-2-carboxylates, in accordance with the Fiesselmann thiophene synthesis protocol. Finally, the desired N,S-heterohexacenes were obtained by conversion of these fused 3-aminothiophene-2-carboxylates into the corresponding 3-aminothiophene intermediates, which acted as synthetic equivalents of thiophen-3(2 H)-ones, followed by their acid-promoted reaction with arylhydrazines, in accordance with the Fischer indolization procedure.

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