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220936-57-2

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220936-57-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 220936-57-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,9,3 and 6 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 220936-57:
(8*2)+(7*2)+(6*0)+(5*9)+(4*3)+(3*6)+(2*5)+(1*7)=122
122 % 10 = 2
So 220936-57-2 is a valid CAS Registry Number.

220936-57-2Relevant articles and documents

Enantioselective synthesis of 1-aryl-tetrahydroisoquinolines through iridium catalyzed asymmetric hydrogenation

Berhal, Farouk,Wu, Zi,Zhang, Zhaoguo,Ayad, Tahar,Ratovelomanana-Vidal, Virginie

supporting information; experimental part, p. 3308 - 3311 (2012/08/28)

Asymmetric hydrogenation of 1-aryl-3,4-dihydroisoquinolines using the [IrCODCl]2/(R)-3,5-diMe-Synphos catalyst is reported. Under mild reaction conditions, this atom-economical process provides easy access to a variety of enantioenriched 1-aryl-1,2,3,4-tetrahydroisoquinoline derivatives, which are important pharmacophores found in several pharmaceutical drug candidates, in high yields and enantiomeric excesses up to 99% after a single crystallization.

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