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209409-58-5

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209409-58-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 209409-58-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,9,4,0 and 9 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 209409-58:
(8*2)+(7*0)+(6*9)+(5*4)+(4*0)+(3*9)+(2*5)+(1*8)=135
135 % 10 = 5
So 209409-58-5 is a valid CAS Registry Number.

209409-58-5Relevant articles and documents

Diastereoselective Synthesis of Cis-3- And 3,5-Alkylpyrrolizidines

Provot, Olivier,Celerier, Jean-Pierre,Lhommet, Gerard

, p. 371 - 376 (2007/10/03)

Cis-3 and 3,5-substituted pyrrolizidines can be prepared from β-enaminolactones. Substituted pyrrolidinoketones lead to these compounds by an amino reductive annelation with a low diastereomeric excess, but a best access to these azabicycles consists in preparing cis-2,5-disubstituted pyrrolidines which are then transformed into the expected heterocycles.

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