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251294-92-5

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251294-92-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 251294-92-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,1,2,9 and 4 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 251294-92:
(8*2)+(7*5)+(6*1)+(5*2)+(4*9)+(3*4)+(2*9)+(1*2)=135
135 % 10 = 5
So 251294-92-5 is a valid CAS Registry Number.

251294-92-5Relevant articles and documents

Ortho-hydroxyalkylation of aminopyridines: A novel approach to heterocycles

Zakrzewski, Peter,Gowan, Mathew,Trimble, Laird A.,Lau, Cheuk K.

, p. 1893 - 1902 (2007/10/03)

Reaction of 6-substituted N-alkyl-3-aminopyridines with aldehydes in the presence of dichlorophenylborane gives selectively 2-hydroxyalkyl-3- aminopyridines. Dehydration of the latter under pyrolytic or Lewis acid conditions generates a quinone methide imine intermediate which can undergo electrocyclic or [4+2] cycloaddition reactions to give naphthyridines, dihydronaphthyridines or tetrahydronaphthyridines. Palladium-catalyzed cyclization of the 2-(1-hydroxyallyl)-3-aminopyridines gives the corresponding 4-azaindoles.

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