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21559-73-9

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21559-73-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21559-73-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,5,5 and 9 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 21559-73:
(7*2)+(6*1)+(5*5)+(4*5)+(3*9)+(2*7)+(1*3)=109
109 % 10 = 9
So 21559-73-9 is a valid CAS Registry Number.

21559-73-9Relevant articles and documents

Protecting group free glycosidations using p-toluenesulfonohydrazide donors

Gudmundsdottir, Anna V.,Nitz, Mark

supporting information; scheme or table, p. 3461 - 3463 (2009/04/16)

(Figure Presented) N-Glycopyranosylsulfonohydrazides are introduced as glycosyl donors for protecting group free synthesis of O-glycosides, glycosyl azides, and oxazolines. Mono- and disaccharides containing a reducing terminal N-acelylglucosamine residue were condensed with p-toluenesulfonylhydrazide to give the desired β-D-pyranose donors. These donors can be activated with NBS and then glycosidated with the desired alcohol or transformed to the oxazoline or glycosyl azide.

The synthesis of α-glycosides of methyl N-acetylmuramyl-L-alanyl-D-isoglutaminate

Zemlyakov,Kur'yanov,Tsikalov,Chirva

, p. 393 - 397 (2007/10/03)

1-Heptanol, cyclohexanol, and cholesterol were glycosylated with α-glucosaminylchloride peracetate in the presence of HgI2 at 80-90°C to the corresponding peracetylated α-glycosides of N-acetylglucosamine. Successive Zemplen deacetylation, benz

Anomeric C-19-steroid N-acetylglucosaminides.

Sauer,Matsui,Bloch,Liang,Fukushima

, p. 3525 - 3530 (2007/10/07)

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