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257933-73-6

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257933-73-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 257933-73-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,7,9,3 and 3 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 257933-73:
(8*2)+(7*5)+(6*7)+(5*9)+(4*3)+(3*3)+(2*7)+(1*3)=176
176 % 10 = 6
So 257933-73-6 is a valid CAS Registry Number.

257933-73-6Downstream Products

257933-73-6Relevant articles and documents

An efficient one-pot route to symmetrically and unsymmetrically substituted 1,4,7-triazacyclononanes also results in the isolation of a stable macrocyclic aminal

Pulacchini, Sonia,Watkinson, Michael

, p. 9363 - 9365 (1999)

A one-pot methodology has been developed for the direct synthesis of symmetrically and unsymmetrically N-substituted derivatives of 1,4,7-triazacyclononane. In the course of these studies the unexpected eight-membered cyclic aminal 7 has been isolated via an acid-catalysed rearrangement of enamine 5.

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