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500228-79-5

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500228-79-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 500228-79-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,0,0,2,2 and 8 respectively; the second part has 2 digits, 7 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 500228-79:
(8*5)+(7*0)+(6*0)+(5*2)+(4*2)+(3*8)+(2*7)+(1*9)=105
105 % 10 = 5
So 500228-79-5 is a valid CAS Registry Number.

500228-79-5Downstream Products

500228-79-5Relevant articles and documents

Rhodium-catalyzed addition of arylboronic acids to alkynyl aza-heteroaromatic compounds in water

Lautens, Mark,Yoshida, Masahiro

, p. 762 - 769 (2003)

Alkynyl heteroaromatic compounds reacted with arylboronic acids to give addition products in the presence of a rhodium catalyst. The best results were obtained when a novel pyridine-substituted water-soluble phosphine ligand was used. The reactions proceed to give trisubstituted alkenes from various arylboronic acids and alkynyl heteroaromatic compounds with high regioselectivity. Only alkynes with a nitrogen atom in proximity to the triple bond were converted to the corresponding alkenes, as expected for a chelation-controlled addition.

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