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511542-03-3

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511542-03-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 511542-03-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,1,1,5,4 and 2 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 511542-03:
(8*5)+(7*1)+(6*1)+(5*5)+(4*4)+(3*2)+(2*0)+(1*3)=103
103 % 10 = 3
So 511542-03-3 is a valid CAS Registry Number.

511542-03-3Relevant articles and documents

Divergent synthesis of D-erythro-sphingosine, L-threo-sphingosine, and their regioisomers

Olofsson, Berit,Somfai, Peter

, p. 2514 - 2517 (2007/10/03)

Starting from a vinyl epoxide, a divergent synthesis of four sphingosine isomers is described. The remaining four isomers can easily be synthesized using the same methodology. Although numerous syntheses of sphingosine have been published, this is the first general route leading to all eight isomers in this important compound class. The synthetic strategy relies on regioselective opening of a vinyl epoxide and a vinylaziridine in the allylic position.

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