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20538-40-3

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20538-40-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20538-40-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,5,3 and 8 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 20538-40:
(7*2)+(6*0)+(5*5)+(4*3)+(3*8)+(2*4)+(1*0)=83
83 % 10 = 3
So 20538-40-3 is a valid CAS Registry Number.

20538-40-3Downstream Products

20538-40-3Relevant articles and documents

Asymmetric Homogeneous Hydrogenation of 2-Pyridones

Wysocki, Jedrzej,Schlepphorst, Christoph,Glorius, Frank

, p. 1557 - 1562 (2015)

An asymmetric homogeneous hydrogenation of 2(1H)-pyridones has been developed, using a ruthenium complex bearing two chiral N-heterocyclic carbene (NHC) ligands. To the best of our knowledge, the presented reaction is the first example of a homogeneous asymmetric conversion of 2-pyridones into the corresponding enantioenriched 2-piperidones.

Regioselective synthesis of piperidinones by metal catalyzed ring expansion-carbonylation reactions. Remarkable cobalt and/or ruthenium carbonyl catalyzed rearrangement and cyclization reactions

De Wang,Alper

, p. 7018 - 7024 (2007/10/02)

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