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87116-40-3

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87116-40-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 87116-40-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,1,1 and 6 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 87116-40:
(7*8)+(6*7)+(5*1)+(4*1)+(3*6)+(2*4)+(1*0)=133
133 % 10 = 3
So 87116-40-3 is a valid CAS Registry Number.

87116-40-3Relevant articles and documents

Synthesis of new pyrazoline-nucleoside analogue derivatives

Azouz,Lammara,Benallia,Guenane

, p. 294 - 305 (2013/08/26)

In this work, a synthesis of pyrazoline nucleosides analogues is presented, using the stereospecific sodium salt glycosylation procedure. In the first step, chalcones were prepared using Claisen Schmidt reaction by reacting benzaldehyde with enolizable ketones in ethanolic NaOH solutions. Next, these chalcones were immediately reacted with hydrazine hydrochloridein the presence of dry methanol to obtain the corresponding 2-pyrazolines. Finally, the coupling of the pyrazolines with 1-chloro-arabinofuranose leads to different β-nucleosides as the major product (13-17) in good yields. The structures of these derivatives were characterized by infrared and 1HNMR spectroscopy and mass spectrometry.

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