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134747-54-9

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134747-54-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 134747-54-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,4,7,4 and 7 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 134747-54:
(8*1)+(7*3)+(6*4)+(5*7)+(4*4)+(3*7)+(2*5)+(1*4)=139
139 % 10 = 9
So 134747-54-9 is a valid CAS Registry Number.

134747-54-9Relevant articles and documents

ASYMMETRICALLY SUBSTITUTED CALIXARENES; A TWO-DIMENSIONAL 1H NMR STUDY OF A TETRAESTER DERIVATIVE IN THE CONE-CONFORMATION

Zetta, Lucia,Wolff, Artur,Vogt, Walter,Platt, Karl-Ludwig,Boehmer, Volker

, p. 1911 - 1924 (2007/10/02)

Several new chiral calixarenes with three or four different substituents in the p-position have been prepared by fragment condensation.Standard derivation procedures always led to the formation of mixtures of various conformational isomeres from which the derivative in the cone-conformation could be isolated only by preparative HPLC.For a tetraester derivative it was shown by two-dimensional 1H NMR spectroscopy, that due to the different substituents the cone-conformation is strongly distorted.The sodium complex of this tetraester, however, assumes a regular cone-conformation again.

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