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556059-98-4

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556059-98-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 556059-98-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,5,6,0,5 and 9 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 556059-98:
(8*5)+(7*5)+(6*6)+(5*0)+(4*5)+(3*9)+(2*9)+(1*8)=184
184 % 10 = 4
So 556059-98-4 is a valid CAS Registry Number.

556059-98-4Relevant articles and documents

Synthesis of novel chiral guanidine catalyst and its application in the asymmetric Pictet-Spengler reaction

Ahmad, Saeed,Shukla, Lakshmi,Szawka?o, Joanna,Roszkowski, Piotr,Maurin, Jan K.,Czarnocki, Zbigniew

, p. 44 - 47 (2017)

A new chiral guanidine catalyst has been synthesized by the reaction of (R)-1-(1-phenylethyl)guanidine and 2,3-diphenylcycloprop-2-enone. The catalyst was evaluated for the Pictet-Spengler reaction in which tetrahydro-β-carbolines were obtained in good yi

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