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77924-17-5

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77924-17-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 77924-17-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,9,2 and 4 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 77924-17:
(7*7)+(6*7)+(5*9)+(4*2)+(3*4)+(2*1)+(1*7)=165
165 % 10 = 5
So 77924-17-5 is a valid CAS Registry Number.

77924-17-5Relevant articles and documents

Rapid cesium fluoride catalyzed synthesis of 5-aryloxy-1-phenyl-1htetrazoles via nucleophilic aromatic substitution

Khan, Khalid Mohammed,Fatima, Itrat,Perveen, Shahnaz,Saad, Syed Muhammad

, p. 389 - 394 (2021/09/07)

A nucleophilic aromatic substitution via a new and facile cesium fluoride catalyzed synthetic approach to get 5-aryloxy-1-phenyl-1H-tetrazoles was developed. Dual usage of cesium fluoride as a nucleophilic catalyst as well as an electrophilic catalyst aff

Tetrazoles. XXXI. Phase-Transfer Reactions of 1-Substituted Tetrazole-5-thiones and Their Derivatives

Gol'tsberg,Koldobskii

, p. 1194 - 1201 (2007/10/03)

Alkylation of 1-substituted tetrazole-5-thiones under conditions of phase-transfer catalysis in the two-phase system liquid-liquid proceeds regioselectively at the sulfur atom, regardless of the alkylating agent and phase-transfer catalyst. Phase-transfer oxidation of the 5-alkylthiotetrazoles thus obtained by potassium permanganate is a convenient method for preparation of 5-alkylsulfonyltetrazoles which can be used to synthesize functionally substituted tetrazoles.

Simple Method of Preparation 5-Alkyl(aryl)oxy-1-Phenyltetrazoles

Gol'tsberg, M. A.,Koldobskii, G. I.

, p. 1552 - 1553 (2007/10/03)

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