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434957-51-4

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434957-51-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 434957-51-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,3,4,9,5 and 7 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 434957-51:
(8*4)+(7*3)+(6*4)+(5*9)+(4*5)+(3*7)+(2*5)+(1*1)=174
174 % 10 = 4
So 434957-51-4 is a valid CAS Registry Number.

434957-51-4Relevant articles and documents

Highly effective chiral ortho-substituted BINAPO ligands (o-BINAPO): Applications in Ru-catalyzed asymmetric hydrogenations of β-aryl-substituted β-(acylamino)acrylates and β-keto esters

Zhou, Yong-Gui,Tang, Wenjun,Wang, Wen-Bo,Li, Wenge,Zhang, Xumu

, p. 4952 - 4953 (2002)

A novel family of chiral ortho-substituted BINAPO ligands (o-BINAPO) were synthesized from BINOL, and their Ru complexes were highly efficient catalysts for asymmetric hydrogenation of β-aryl-substituted β-(acylamino)acrylates and β-aryl-substituted β-keto esters. The Ru-bisphosphinite catalysts can tolerate an E/Z mixture of β-aryl-substituted β-(acylamino)acrylates. These highly enantioselective hydrogenations provide a useful way to prepare β-aryl-substituted β-amino acids and β-hydroxyl acids. Copyright

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