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5,7,23,25-tetrakis(ethoxycarbonyl)-2,11,20,29-tetrakis(4-tolylsulfonyl)-2,11,20,29-tetraaza<3.3>(1,3)(1,3)<3.3>(4,6)(1,3)benzeno<3>phane is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

156417-89-9

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156417-89-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 156417-89-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,4,1 and 7 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 156417-89:
(8*1)+(7*5)+(6*6)+(5*4)+(4*1)+(3*7)+(2*8)+(1*9)=149
149 % 10 = 9
So 156417-89-9 is a valid CAS Registry Number.

156417-89-9Relevant academic research and scientific papers

Belt-Shaped Molecules by a Repetitive Synthetic Strategy

Josten, Wolfgang,Karbach, Detlef,Nieger, Martin,Voegtle, Fritz,Haegele, Klaus,et al.

, p. 767 - 778 (2007/10/02)

Belt-shaped molecules of the general type 2 containing up to five benzene ring units (cf. 37) have been synthesized by macrocyclisation reactions of ribbon-shaped precursors.An intermolecular cyclization step generates the macroheterocycles 38 and 40.The fourfold-bridged cyclophane 36 are prepared by intra- and intermolecular cyclization reactions.The X-ray structure analyses of 14, 16, 22, 23, 28, and 36 show S-shaped conformations of the molecules. - Key Words: Azaphanes / Cyclophanes / Macrocycles / Molecular belts / Multistep strategy

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