Cas 420840-13-7,3-cyanomethyl-1(1-phenyl-ethyl)-pyrrolidine-2-carboxylic acid methyl ester

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Check Digit Verification of cas no

The CAS Registry Mumber 420840-13-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,2,0,8,4 and 0 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 420840-13:
(8*4)+(7*2)+(6*0)+(5*8)+(4*4)+(3*0)+(2*1)+(1*3)=107
107 % 10 = 7
So 420840-13-7 is a valid CAS Registry Number.

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420840-13-7Downstream Products

420840-17-1 (2R,3R)-3-Methoxycarbonylmethyl-pyrrolidine-1,2-dicarboxylic acid 1-benzyl ester 2-methyl ester

420840-13-7Relevant academic research and scientific papers

Short asymmetric synthesis of (2S,3S)- and (2S,3R)-3-prolinoglutamic acids: 2-carboxy-3-pyrrolidine-acetic acids (CPAA)

Karoyan, Philippe,Chassaing, Gérard

, p. 253 - 255 (2002)

The asymmetric synthesis of both cis and trans 3-prolinoglutamic acids can be easily achieved in a diastereoselective and enantioselective way via the amino-zinc-enolate cyclisation.

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