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80561-33-7

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80561-33-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 80561-33-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,0,5,6 and 1 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 80561-33:
(7*8)+(6*0)+(5*5)+(4*6)+(3*1)+(2*3)+(1*3)=117
117 % 10 = 7
So 80561-33-7 is a valid CAS Registry Number.

80561-33-7Relevant articles and documents

Pyridinium Ylides Derived from Pyryliums and Amines and a Novel Rearrangement of 1-Vinyl-1,2-dihydropyridines

Katritzky, Alan R.,Chermprapai, Amornsri,Patel, Ranjan C.,Tarraga-Tomas, Alberto

, p. 492 - 497 (2007/10/02)

1-Benzyl-2,4-diphenylpyridiniums with benzaldehydes give oxazolopyridines which are dehydrated to 1-styryl derivatives.On pyrolysis the 1-styryl-1,2-dihydropyridine 21a gave 2,4,6-triphenylpyridine and m-chlorostyrene by a ring-enlargement-ring-contraction mechanism: this is a general reaction of 1-vinyl-1,2-dihydropyridines.

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