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141989-40-4

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141989-40-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 141989-40-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,1,9,8 and 9 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 141989-40:
(8*1)+(7*4)+(6*1)+(5*9)+(4*8)+(3*9)+(2*4)+(1*0)=154
154 % 10 = 4
So 141989-40-4 is a valid CAS Registry Number.

141989-40-4Relevant articles and documents

Synthesis and properties of 2-(2-furyl)- and 2-(2-thienyl)-1-methylphenanthro[9,10-d]imidazoles

Pechkin,El'chaninov,Stoyanov

, p. 726 - 730 (2002)

Condensation of 9,10-phenanthrenequinone with 2-furaldehyde and 2-thiophenecarbaldehyde in glacial acetic acid in the presence of ammonium acetate gave 2-(2-furyl)- and 2-(2-thienyl)phenanthro[9,10-d]imidazoles which were converted into the corresponding 1-methyl derivatives. The furan and thiophene rings in the products lose their acidophobic properties. Depending on the conditions, electrophilic substitution reactions in 2-(2-furyl)- and 2-(2-thienyl)phenanthro[9,10-d]imidazoles occur both at the furan (thiophene) and phenanthrene moieties.

INVESTIGATIONS OF 2-SUBSTITUTED IMIDAZOLES. 2. SYNTHESIS AND ELECTROPHILIC SUBSTITUTION OF 1-METHYL-2-(THIENYL-2)IMIDAZOLE. A CONVENIENT METHOD OF METHYLATION OF 2-R-IMIDAZOLES

Stoyanov, V. M.,El'chaninov, M. M.,Pozharskii, A. F.

, p. 1140 - 1144 (2007/10/02)

We have synthesized 2-(thienyl-2)imidazole and its N-methyl derivative.The latter product was obtained by nitration, bromination, acylation, and formylation, occurring as a rule on the thiophene ring.A general method for methylating 2-R-imidazoles with methyl iodide KOH-dimethoxy ethane is proposed.

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