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64156-91-8

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64156-91-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 64156-91-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,4,1,5 and 6 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 64156-91:
(7*6)+(6*4)+(5*1)+(4*5)+(3*6)+(2*9)+(1*1)=128
128 % 10 = 8
So 64156-91-8 is a valid CAS Registry Number.

64156-91-8Relevant articles and documents

Synthesis of 3,5-disubstituted 1,2,4-triazoles containing an amino group

Khromova, N. Yu.,Fedorov,Malekin,Kutkin

, p. 1490 - 1495 (2016/11/29)

3,5-Disubstituted 1,2,4-triazoles containing linear and cyclic amine fragments have been synthesized by thermal cyclization of N′-(1-iminoalkyl) hydrazides prepared by condensation of imido esters with carboxylic acid hydrazides. The initial imido esters have been synthesized by the Pinner reaction, as well as by reaction of nitriles with methanol in the presence of a catalytic amount of sodium methoxide. A procedure has been developed for the synthesis of 5-substituted 3-(3-nitrophenyl)-1,2,4-triazoles which have been converted to 3-aminophenyl derivatives by reduction with hydrazine hydrate over Raney nickel.

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