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1256168-89-4

1256168-89-4

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1256168-89-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1256168-89-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,6,1,6 and 8 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1256168-89:
(9*1)+(8*2)+(7*5)+(6*6)+(5*1)+(4*6)+(3*8)+(2*8)+(1*9)=174
174 % 10 = 4
So 1256168-89-4 is a valid CAS Registry Number.

1256168-89-4Relevant articles and documents

Regio- and enantioselective intermolecular hydroacylation: Substrate-directed addition of salicylaldehydes to homoallylic sulfides

Coulter, Matthew M.,Kou, Kevin G. M.,Galligan, Baye,Dong, Vy M.

supporting information; experimental part, p. 16330 - 16333 (2011/02/23)

We report a Rh-catalyzed, regio- and enantioselective intermolecular olefin hydroacylation under mild conditions. Hydroacylations between homoallylic sulfides, containing a substrate-bound directing group, and salicylaldehyde derivatives occur in the presence of a spiro-phosphoramidite ligand, (R)-SIPHOS-PE, to give α-branched ketones in >20:1 selectivity and up to 97% ee. Our conditions are also applicable to the asymmetric intermolecular hydroacylation of 1,2-disubstituted olefins.

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