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781657-63-4

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781657-63-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 781657-63-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,8,1,6,5 and 7 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 781657-63:
(8*7)+(7*8)+(6*1)+(5*6)+(4*5)+(3*7)+(2*6)+(1*3)=204
204 % 10 = 4
So 781657-63-4 is a valid CAS Registry Number.

781657-63-4Relevant articles and documents

A modular strategy toward the synthesis of heparin-like oligosaccharides using monomeric building blocks in a sequential glycosylation strategy

Codee, Jeroen D. C.,Stubba, Bas,Schiattarella, Marialuisa,Overkleeft, Herman S.,Van Boeckel, Constant A. A.,Van Boom, Jacques H.,Van Der Marel, Gijsbert A.

, p. 3767 - 3773 (2007/10/03)

A novel flexible assembly strategy is described for the modular synthesis of heparin and heparan sulfates. The reported strategy uses monomeric building bocks to construct the oligosaccharide chain to attain a maximum degree of flexibility. In the assembly, 1-hydroxyl glucosazido- and 1-thio uronic acid donors are combined in a sequential glycosylation protocol using sulfonium triflate activator systems. The key 1-thio uronic acids were obtained in an efficient manner from diacetone glucose employing a chemo- and regioselective oxidation of partially protected glucose and idose thioglycosides.

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