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212121-59-0

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212121-59-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 212121-59-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,2,1,2 and 1 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 212121-59:
(8*2)+(7*1)+(6*2)+(5*1)+(4*2)+(3*1)+(2*5)+(1*9)=70
70 % 10 = 0
So 212121-59-0 is a valid CAS Registry Number.

212121-59-0Relevant articles and documents

Highly enantioselective synthesis of cyclic and functionalized α-amino acids by means of a chiral phase transfer catalyst

Corey,Noe, Mark C,Xu, Feng

, p. 5347 - 5350 (1998)

The chiral quaternary ammonium salt 1 serves as phase transfer catalyst for the enantioselective conversion of the glycine derivative 2 to a variety of cyclic and acyclic chiral α amino acids with enantioselectivities as high as 200:1 in alkylation and Michael addition reactions.

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