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77134-20-4

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77134-20-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 77134-20-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,1,3 and 4 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 77134-20:
(7*7)+(6*7)+(5*1)+(4*3)+(3*4)+(2*2)+(1*0)=124
124 % 10 = 4
So 77134-20-4 is a valid CAS Registry Number.

77134-20-4Relevant articles and documents

Triazolopyridines. 16. Lithiation of 3-Cianotriazolo-pyridine

Jones, Gurnos,Mouat, Deborah J.,Pitman, Mark A.,Lunt, Edward,Lythgoe, David J.

, p. 10969 - 10978 (1995)

Various methods for the synthesis of 3-cyanotriazolopyridine 8 by diazo transfer to 2-pyridylacetonitrile are described.Lithiation of the triazolopyridine 8 using LDA or TMPA followed by quenching with TMS chloride, gave the 4-mono-, the 7-mono-, and the

[1,2,3]Triazolo[1,5-a]pyridine - a synthon for 6-substituted pyridine-2-carboxaldehydes

Jones, Gurnos,Sliskovic, D.Robert

, p. 4529 - 4530 (2007/10/02)

[1,2,3]Triazolo[1,5-a]pyridine (1) is lithiated in position 7; the lithio derivative is used to synthesize triazolopyridinyl alcohols (6) which can be converted into 6-substituted pyridine-2-aldehydes (3).

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