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172283-28-2

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172283-28-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 172283-28-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,2,2,8 and 3 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 172283-28:
(8*1)+(7*7)+(6*2)+(5*2)+(4*8)+(3*3)+(2*2)+(1*8)=132
132 % 10 = 2
So 172283-28-2 is a valid CAS Registry Number.

172283-28-2Relevant articles and documents

Paracyclophanes: Extending the bridges. Synthesis

Pechlivanidis, Zissis,Hopf, Henning,Ernst, Ludger

experimental part, p. 223 - 237 (2009/06/21)

Preparatively satisfactory routes to [3.2]paracyclophane (10), [4.2]paracyclophane (14), [4.3]paracyclophane (19) as well as several derivatives of these compounds - among others the bromides 25, the ester 31, the diesters 40-43 - are described using well-established methods of cyclophane chemistry (ring-closure reactions leading to thiacyclophanes, ring contraction by sulfone pyrolysis). The parent systems and their derivatives are now available in gram quantities allowing a study of their chemical properties. Wiley-VCH Verlag GmbH & Co. KGaA, 2009.

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