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1140909-23-4

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1140909-23-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1140909-23-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,4,0,9,0 and 9 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1140909-23:
(9*1)+(8*1)+(7*4)+(6*0)+(5*9)+(4*0)+(3*9)+(2*2)+(1*3)=124
124 % 10 = 4
So 1140909-23-4 is a valid CAS Registry Number.

1140909-23-4Downstream Products

1140909-23-4Relevant articles and documents

Direct anti-selective asymmetric hydrogenation of α-amino-β-keto esters through dynamic kinetic resolution using Ru-axially chiral phosphine catalysts-stereoselective synthesis of anti-β-hydroxy-α-amino acids

Makino, Kazuishi,Goto, Takayuki,Hiroki, Yasuhiro,Hamada, Yasumasa

, p. 2816 - 2828 (2008)

The asymmetric hydrogenation of α-amino-β-keto esters using ruthenium (Ru) anti-selectively proceeds via a dynamic kinetic resolution to afford anti-β-hydroxy-α-amino acids with high enantiomeric purities, which are important chiral building blocks for the synthesis of medicines and natural products. A mechanistic investigation has revealed that the Ru-catalyzed asymmetric hydrogenation takes place via the hydrogenation of the double bond in the enol tautomer of the substrate.

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