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881812-57-3

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881812-57-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 881812-57-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,8,1,8,1 and 2 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 881812-57:
(8*8)+(7*8)+(6*1)+(5*8)+(4*1)+(3*2)+(2*5)+(1*7)=193
193 % 10 = 3
So 881812-57-3 is a valid CAS Registry Number.

881812-57-3Relevant articles and documents

Advantage of in situ generation of N-arylsulfonyl imines from α-amide sulfones in the phase-transfer-catalyzed asymmetric Strecker reaction

Ooi, Takashi,Uematsu, Yukitaka,Fujimoto, Jun,Fukumoto, Kazuhiro,Maruoka, Keiji

, p. 1337 - 1340 (2007/10/03)

Highly efficient, catalytic enantioselective synthesis of N-arylsulfonyl α-amino nitriles from the corresponding α-amido sulfones has been achieved under toluene-aqueous potassium cyanide biphasic conditions using chiral quaternary ammonium iodide (R,R,R)-1 as an effective phase-transfer catalyst. This Strecker synthesis involving the in situ generation of the reactive N-sulfonyl imines is advantageous for the cyanation of the substrates having primary and secondary alkyl substituents.

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