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127218-69-3

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127218-69-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 127218-69-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,7,2,1 and 8 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 127218-69:
(8*1)+(7*2)+(6*7)+(5*2)+(4*1)+(3*8)+(2*6)+(1*9)=123
123 % 10 = 3
So 127218-69-3 is a valid CAS Registry Number.

127218-69-3Relevant articles and documents

Sigmatropic rearrangement of ammonium ylideskey step in the synthesis of methyl 2-formylphenyl acetate

Kowalkowska, Anna,Jonczyk, Andrzej

, p. 3308 - 3317 (2011/09/21)

N-Cyanomethyl-N,N-dimethyl-N-(-methoxycarbonyl)benzylammonium salts 5 were synthesized and treated with different base/solvent systems, giving the products of sigmatropic rearrangements [2,3] 7 and [1,2] 8. In reactions carried out in liquid ammonia, [2,3] rearrangement definitively prevailed. Pure 7(or mixture of 7 and 8) were deprotected to afford methyl 2-formylphenyl acetate (9) in good yield.

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