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25488-25-9

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25488-25-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 25488-25-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,5,4,8 and 8 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 25488-25:
(7*2)+(6*5)+(5*4)+(4*8)+(3*8)+(2*2)+(1*5)=129
129 % 10 = 9
So 25488-25-9 is a valid CAS Registry Number.

25488-25-9Relevant articles and documents

Stereoselective synthesis of β-alkylated α-amino acids via palladium-catalyzed alkylation of unactivated methylene C(sp3)-H Bonds with Primary Alkyl Halides

Zhang, Shu-Yu,Li, Qiong,He, Gang,Nack, William A.,Chen, Gong

supporting information, p. 12135 - 12141 (2013/09/02)

We report a new set of reactions based on the Pd-catalyzed alkylation of methylene C(sp3)-H bonds of aliphatic quinolyl carboxamides with α-haloacetate and methyl iodide and applications in the stereoselective synthesis of various β-alkylated α-amino acids. These reactions represent the first generally applicable method for the catalytic alkylation of unconstrained and unactivated methylene C-H bonds with high synthetic relevance. When applied with simple isotope-enriched reagents, they also provide a convenient and powerful means to site-selectively incorporate isotopes into the carbon scaffolds of amino acid compounds.

A Versatile Chemo-Enzymatic Route to Enantiomerically Pure β-Branched α-Amino Acids

Roff, Geoffrey J.,Lloyd, Richard C.,Turner, Nicholas J.

, p. 4098 - 4099 (2007/10/03)

A series of diastereoisomers of β-methyl-β-phenylalanine analogues 1a?f have been prepared in enantiomerically pure form using a combination of chemo- and biocatalysis. Starting from l-threonine methyl ester 2, a range of β,β-disubstituted didehydroamino

Catalytic asymmetric hydrogenation of α-(acetamido)acrylates using TRAP trans-chelating chiral bisphosphine ligands: Remarkable effects of ligand P-substituent and hydrogen pressure on enantioselectivity

Kuwano,Sawamura,Ito

, p. 2571 - 2578 (2007/10/03)

The catalytic asymmetric hydrogenation of α-(acetamido)acrylates was carded out with the rhodium complexes prepared from [Rh(cod)2]BF4 and trans-chelating chiral bisphosphine ligands, (S,S)-2,2'-bis[(R)-1-(dialkylphosphino)ethyl]-1,1

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