Cas 20201-20-1,Phosphine, dibutyl(phenylethynyl)-

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Check Digit Verification of cas no

The CAS Registry Mumber 20201-20-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,2,0 and 1 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 20201-20:
(7*2)+(6*0)+(5*2)+(4*0)+(3*1)+(2*2)+(1*0)=31
31 % 10 = 1
So 20201-20-1 is a valid CAS Registry Number.

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20201-20-1Relevant articles and documents

New Approach to Phosphinoalkynes Based on Pd- and Ni-Catalyzed Cross-Coupling of Terminal Alkynes with Chlorophosphanes

Beletskaya, Irina P.,Afanasiev, Vladimir V.,Kazankova, Marina A.,Efimova, Irina V.

, p. 4309 - 4311 (2007/10/03)

(Equation presented) The first example of direct phosphination of terminal alkynes with chlorophosphanes catalyzed by Ni or Pd complexes is described. Both aromatic and aliphatic terminal acetylenes undergo the coupling reaction to give corresponding coup

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20201-20-1