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872280-40-5

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872280-40-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 872280-40-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,7,2,2,8 and 0 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 872280-40:
(8*8)+(7*7)+(6*2)+(5*2)+(4*8)+(3*0)+(2*4)+(1*0)=175
175 % 10 = 5
So 872280-40-5 is a valid CAS Registry Number.

872280-40-5Relevant articles and documents

Attempted [2]Catenane Synthesis via a Quasi[1]catenane by a Templated Backfolding Strategy

Steemers, Luuk,Wanner, Martin J.,van Leeuwen, Bart R. C.,Hiemstra, Henk,van Maarseveen, Jan H.

, p. 874 - 878 (2018)

A templated backfolding concept to construct a [2]catenane was attempted via a quasi[1]catenane showing an inverted spiro geometry. The template is covalently connected to the ketal-connected semi-perpendicular-arranged linear precursors and spatially directs the sterically congested backfolding macrocyclizations that are required to give a quasi[1]catenane. So far, we are unable to hydrolyze the cyclic ketal to liberate the [2]catenane.

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