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139042-74-3

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139042-74-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 139042-74-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,0,4 and 2 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 139042-74:
(8*1)+(7*3)+(6*9)+(5*0)+(4*4)+(3*2)+(2*7)+(1*4)=123
123 % 10 = 3
So 139042-74-3 is a valid CAS Registry Number.

139042-74-3Downstream Products

139042-74-3Relevant articles and documents

Enantioselective Synthesis of Optically Active Pyridine Derivatives and C2-Symmetric 2,2'-Bipyridines

Bolm, Carsten,Ewald, Martina,Felder, Marcel,Schlingloff, Gunther

, p. 1169 - 1190 (2007/10/02)

Optically active pyridine derivatives 2, 15, 18, 19, 21, 26, and 27 are obtained by enantioselective reduction of the corresponding ketones 5, 7, 11-13, 24, and 25 using the chiral borane reagent chlorodiisopinocampherylborane .Nickel(0)-mediated coupling of bromopyridines 2, 15, and 31 gives C2-symmetric 2,2'-bipyridines (R,R)-32, (R,R)-33, and (S,S)-38, respectively, which form metal complexex with Co(II), Pd(II), Cu(I), and Ag(I).Aryl-substituted pyridines 26, and 39-41 are synthesized by palladium(0)-catalized cross coupling of 2 and 15 with boronic acids 42-44.Key Words: 2,2-Bipyridines / Pyridines, optically active / Chiral ligands / Asymmetric Synthesis / Catalysis, enantioselective

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