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205943-58-4

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205943-58-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 205943-58-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,5,9,4 and 3 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 205943-58:
(8*2)+(7*0)+(6*5)+(5*9)+(4*4)+(3*3)+(2*5)+(1*8)=134
134 % 10 = 4
So 205943-58-4 is a valid CAS Registry Number.

205943-58-4Downstream Products

205943-58-4Relevant articles and documents

Stepwise Approach toward First Generation Nonenzymatic Hydrolases

Madder, Annemieke,De Clercq, Pierre J.,Declercq, Jean-Paul

, p. 2548 - 2559 (2007/10/03)

The synthesis and reactivity study of a first generation serine protease mimic is described. Central in the design stands the possibility of stabilization of the transition state by an amino triol such as 8t. En route to 8t, a series of amino alcohols (4-8) was obtained, the reactivity of which was studied toward esterification by acetylimidazole (AcIm) and by p-nitro-2,2,2-trifluoroacetanilide (PNTFA). Interesting reactivity differences were observed between the cis- and the trans-series, especially between 7c and 7t (AcIm), and between 8c and 8t (PNTFA). In both cases the results are explained by invoking extra stabilization of the tetrahedral oxyanion.

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