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158257-39-7

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158257-39-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 158257-39-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,8,2,5 and 7 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 158257-39:
(8*1)+(7*5)+(6*8)+(5*2)+(4*5)+(3*7)+(2*3)+(1*9)=157
157 % 10 = 7
So 158257-39-7 is a valid CAS Registry Number.

158257-39-7Relevant articles and documents

Synthesis of Chiral Urethane N-Alkoxycarbonyl Tetramic Acids from Urethane N-Carboxyanhydrides (UNCAs)

Fehrentz, Jean-Alain,Bourdel, Elisabeth,Califano, Jean-Christophe,Chaloin, Oliveir,Devin, Chantal,et al.

, p. 1557 - 1560 (1994)

The synthesis of chiral N-protected tetramic acid derivatives which are precursors of β-hydroxy γ-amino acid under mild conditions is described.Reaction of urethane-N-carboxyanhydrides (UNCAs) with Meldrum's acid in the presence of a tertiary amine, follo

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