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74311-50-5

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74311-50-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 74311-50-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,3,1 and 1 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 74311-50:
(7*7)+(6*4)+(5*3)+(4*1)+(3*1)+(2*5)+(1*0)=105
105 % 10 = 5
So 74311-50-5 is a valid CAS Registry Number.

74311-50-5Relevant articles and documents

Synthesis and catalytic applications of new chiral ferrocenyl P,O ligands

Mateus, Nuno,Routaboul, Lucie,Daran, Jean-Claude,Manoury, Eric

, p. 2297 - 2310 (2007/10/03)

A new method to synthesize both enantiomers of 2-diphenylphosphino-ferrocenecarboxaldehyde with the phosphine group protected as a thiophosphine group was developed. These aldehydes react with 1,2 or 1,3 diols to give, in good yields, new chiral phosphine-acetals. For unsymmetrical (R)-1,3-butanediol, the new asymmetrical acetalic carbon is asymmetric and its configuration was completely controlled by the chirality of the diol. These new P,O ligands were tested in the palladium-catalyzed asymmetric allylic substitution of 1,3-diphenylprop-2-enylacetate. Good yields and enantioselectivities up to 77% were observed. The catalytic performances of two diastereoisomeric ligands with opposite configurations in planar chirality only proved to be significantly different, showing a strong influence of both planar and central chiralities.

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