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1221576-43-7

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1221576-43-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1221576-43-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,2,1,5,7 and 6 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1221576-43:
(9*1)+(8*2)+(7*2)+(6*1)+(5*5)+(4*7)+(3*6)+(2*4)+(1*3)=127
127 % 10 = 7
So 1221576-43-7 is a valid CAS Registry Number.

1221576-43-7Relevant articles and documents

Phosphinite thioethers derived from chiral epoxides. Modular P, S -ligands for pd-catalyzed asymmetric allylic substitutions

Caldentey, Xisco,Pericas, Miquel A.

scheme or table, p. 2628 - 2644 (2010/06/17)

A new family of modular P,S-ligands has been prepared from enantiopure arylglycidols. These ligands have been iteratively optimized with respect to four different structural parameters for use in Pd-catalyzed allylic substitutions. As a final output, highly active and enantioselective ligands for these synthetically important transformations have been developed, and the factors controlling their catalytic behavior have been rationalized. From a methodological point of view, a convenient procedure for the regioselective ring-opening of cis-glycidic esters with bulky thiols to yield the corresponding β-alkylthio-α-hydroxy carboxylic acids has been developed.

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