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156769-28-7

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156769-28-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 156769-28-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,7,6 and 9 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 156769-28:
(8*1)+(7*5)+(6*6)+(5*7)+(4*6)+(3*9)+(2*2)+(1*8)=177
177 % 10 = 7
So 156769-28-7 is a valid CAS Registry Number.

156769-28-7Relevant articles and documents

Synthesis of L-altrose and some derivatives

Lunau, Nathalie,Meier, Chris

, p. 6260 - 6270 (2013/01/15)

A convenient approach to the chemical synthesis of L-altrose (1) and its 6-deoxy derivative 2 has been developed by starting from D-galactose (9) and D-fucose (10), respectively. The 5-epimerization by a Mitsunobu inversion of the open-chain D-hexoses was the key step for these routes. Furthermore, the conversion of 2 into peracetylated TDP-6-deoxy-α-L-altrose (3a) was achieved by the cycloSal approach. However, the final deacetylation led to an unexpected side-reaction resulting in the previously unknown 6-deoxy-α-L-altropyranose 1,3-cyclophosphate (4).

Mirror-Image Carbohydrates: Synthesis of the Unnatural Enantiomer of a Blood Group Trisaccharide

Boulineau, Fabien P.,Wei, Alexander

, p. 3391 - 3399 (2007/10/03)

Methyl D-glucoside and D-glucose pentaacetate are transformed, respectively, into methyl α-O-glucuronide 3 and hydroxymethyl β-C-glucuronide 9, which undergo decarboxylative elimination efficiently to produce 4-deoxypentenoside 4 and L-glucal 10. These unsaturated pyranosides provide an expeditious entry into mirror-image oligosaccharides, as demonstrated in the synthesis of the unnatural enantiomer of the H-type II blood group determinant trisaccharide (D-Fuc-(α1-2)-L-Gal-(β 1-4)-L-GlcNAc-β-OMe). This work illustrates that D-glucose, a common starting material in the synthesis of naturally occurring carbohydrates, can also be used to prepare their mirror-image analogues.

Synthesis and inhibition studies of C-(D-glycopyranosyl)methylamines

Lai, Wen,Martin, Olivier R.

, p. 185 - 194 (2007/10/02)

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