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257298-94-5

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257298-94-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 257298-94-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,7,2,9 and 8 respectively; the second part has 2 digits, 9 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 257298-94:
(8*2)+(7*5)+(6*7)+(5*2)+(4*9)+(3*8)+(2*9)+(1*4)=185
185 % 10 = 5
So 257298-94-5 is a valid CAS Registry Number.

257298-94-5Relevant articles and documents

Nickel-Catalyzed Enantioselective Hydroboration of Vinylarenes

Tran, Hai N.,Stanley, Levi M.

supporting information, p. 395 - 399 (2021/12/27)

The enantioselective hydroboration of vinylarenes catalyzed by a chiral, nonracemic nickel catalyst is presented as a facile method for generating chiral benzylic boronate esters. Various vinylarenes react with bis(pinacolato)diboron (B2pin2) in the presence of MeOH as a hydride source to form chiral boronate esters in up to 92% yield with up to 94% ee. The use of anhydrous Me4NF to activate B2pin2 is crucial for ensuring fast transmetalation to achieve high enantioselectivities.

Cross coupling reactions of chiral secondary organoboronic esters with retention of configuration

Imao, Daisuke,Glasspoole, Ben W.,Laberge, Veronique S.,Crudden, Cathleen M.

supporting information; experimental part, p. 5024 - 5025 (2009/09/30)

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