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142746-73-4

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142746-73-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 142746-73-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,2,7,4 and 6 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 142746-73:
(8*1)+(7*4)+(6*2)+(5*7)+(4*4)+(3*6)+(2*7)+(1*3)=134
134 % 10 = 4
So 142746-73-4 is a valid CAS Registry Number.

142746-73-4Relevant articles and documents

Concave Macroheterocycles

Mekelburger, Hans-Bernhard,Gross, Jens,Schmitz, Juergen,Nieger, Martin,Voegtle, Fritz

, p. 1713 - 1722 (2007/10/02)

Macrocyclic compounds of the general type 2 having a spherical shape and a molecular cavity have been synthesized.A "fold and paste"-type cyclization step generates the macroheterocycles 4,10,11,14, and 21.Since this approach is difficult to apply for O-substituted derivatives, the "spheriphane" 24 was synthesized by intermolecular cyclization.The X-ray structure analysis of 11 shows intermolecular interactions ("dimer formation") in the crystal. Key Words: Concave molecules/ Cyclophanes/ High-dilution principle/ Macrocycles/ Spheriphanes

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