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22224-42-6

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22224-42-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 22224-42-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,2,2,2 and 4 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 22224-42:
(7*2)+(6*2)+(5*2)+(4*2)+(3*4)+(2*4)+(1*2)=66
66 % 10 = 6
So 22224-42-6 is a valid CAS Registry Number.

22224-42-6Relevant articles and documents

Stereocontrolled Syntheses of Deoxyribonucleosides via Photoinduced Electron-Transfer Deoxygenation of Benzoyl-Protected Ribo- and Arabinonucleosides

Wang, Zhiwei,Prudhomme, Daniel R.,Buck, Jason R.,Park, Minnie,Rizzo, Carmelo J.

, p. 5969 - 5985 (2007/10/03)

The stereocontrolled, de novo syntheses of β-2′-deoxy-, α-2′-deoxy-, β-3′-deoxy-, and β-2′,3′-dideoxyribonucleosides are described. Strategically protected ribose, arabinose, and xylose glycosylation precursors were synthesized bearing C2-esters capable of directing Vorbrueggen glycosylation. The key step is the regioselective deoxygenation of the desired hydroxyl group as either the benzoyl- or 3-(trifluoromethyl)benzoyl derivative. This deoxygenation is accomplished via a photoinduced electron-transfer (PET) mechanism using carbazole derivatives as the photosensitizer. The syntheses of the desired deoxynucleoside generally proceed in three steps from a common, readily available precursor.

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