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203301-82-0

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203301-82-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 203301-82-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,3,3,0 and 1 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 203301-82:
(8*2)+(7*0)+(6*3)+(5*3)+(4*0)+(3*1)+(2*8)+(1*2)=70
70 % 10 = 0
So 203301-82-0 is a valid CAS Registry Number.

203301-82-0Relevant articles and documents

Diastereoselective synthesis of 4,5′-bis-proline compounds via reductive dimerization of N-acyloxyiminium ions

Zanardi, Franca,Sartori, Andrea,Curti, Claudio,Battistini, Lucia,Rassu, Gloria,Nicastro, Giuseppe,Casiraghi, Giovanni

, p. 1814 - 1817 (2007/10/03)

A short, practical synthesis of novel, unsymmetrical 4,5′-bis-proline compounds has been achieved, highlighted by the application of an unprecedented samarium diiodide-driven regio- and diastereocontrolled reductive dimerization of N-acyloxyiminium ions generated from readily available 2-methoxy-5- silyloxymethyl-N-Boc pyrrolidines. The title proline dimers proved to be pertinent metal-free catalysts in aldol and Mannich reactions.

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