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176039-81-9

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176039-81-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 176039-81-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,6,0,3 and 9 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 176039-81:
(8*1)+(7*7)+(6*6)+(5*0)+(4*3)+(3*9)+(2*8)+(1*1)=149
149 % 10 = 9
So 176039-81-9 is a valid CAS Registry Number.

176039-81-9Relevant articles and documents

Iodonium ion-assisted synthesis of a tetrameric fragment corresponding to the cell wall phenolic glycolipids of Mycobacterium kansasii serovar I

Zegelaar-Jaarsveld, Korien,Smits, Sander A. W.,Van Straten, Nicole C. R.,Van Der Marel, Gijs A.,Van Boom, Jacques H.

, p. 3593 - 3608 (2007/10/03)

Two procedures are described towards the assembly of the tyramine spacer-containing tetramer 5, a derivative of the phenolic glycolipid of Mycobacterium kansasii serovar I. First, iodonium ion-mediated glycosylation of trimeric acceptor 2a with D-rhamnopyranoside donor 10 gave fully protected tetramer 17. Selective removal of the chloroacetyl group of 17, subsequent deoxygenation and removal of the protective groups, led to target 5. The potential occurrence of double stereodifferentiation (DSD) was examined by condensation of L-fucopyranoside model acceptor 14 with both the enantiomeric rhamnopyranoside donors 10 and 13. The second procedure involves elongation of trimeric acceptor 2b with 6-deoxy-D-glucopyranoside 28. Desulfurisation of the resulting tetrameric fragment 36 followed by hydrogenation of 37 gave 38, the phenylacetyl (PhAc) of which was enzymatically removed to yield target tetramer 5.

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