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18159-13-2

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18159-13-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 18159-13-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,1,5 and 9 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 18159-13:
(7*1)+(6*8)+(5*1)+(4*5)+(3*9)+(2*1)+(1*3)=112
112 % 10 = 2
So 18159-13-2 is a valid CAS Registry Number.

18159-13-2Relevant articles and documents

Highly efficient monophosphine-based catalyst for the palladium-catalyzed Suzuki-Miyaura reaction of heteroaryl halides and heteroaryl boronic acids and esters

Billingsley, Kelvin,Buchwald, Stephen L.

, p. 3358 - 3366 (2007/10/03)

A highly active and efficient catalyst system derived from a palladium precatalyst and monophosphine ligands 1 or 2 for the Suzuki-Miyaura cross-coupling reaction of heteroaryl boronic acids and esters has been developed. This method allows for the preparation of a wide variety of heterobiaryls in good to excellent yields and displays a high level of activity for the coupling of heteroaryl chlorides as well as hindered aryl and heteroaryl halides. Specific factors that govern the efficacy of the transformation for certain heterocyclic motifs were also investigated.

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