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137268-63-4

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137268-63-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 137268-63-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,2,6 and 8 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 137268-63:
(8*1)+(7*3)+(6*7)+(5*2)+(4*6)+(3*8)+(2*6)+(1*3)=144
144 % 10 = 4
So 137268-63-4 is a valid CAS Registry Number.

137268-63-4Downstream Products

137268-63-4Relevant articles and documents

Highly Stereoselective Asymmetric Hydrogenation of 2-Benzamidomethyl-3-oxobutanoate catalysed by Cationic binap-Ruthenium(II) Complexes

Mashima, Kazushi,Matsumura, Yoh-ichi,Kusano, Koh-hei,Kumobayashi, Hidenori,Sayo, Noboru,et al.

, p. 609 - 610 (2007/10/02)

Highly diastereoselective hydrogenation of methyl 2-benzamidomethyl-3-oxobutanoate has been accomplished by using (p-cymene)>I and corresponding complexes of derivatives of binap as catalyst, giving methyl (2S,3R)-2-benzamidomethyl-3-hydroxybutanoate, a versatile intermediate for the synthesis of β-lactam antibiotics, in up to 98percent diastereoisomeric excess and 99percent enantiomeric excess.

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