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741686-50-0

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741686-50-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 741686-50-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,4,1,6,8 and 6 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 741686-50:
(8*7)+(7*4)+(6*1)+(5*6)+(4*8)+(3*6)+(2*5)+(1*0)=180
180 % 10 = 0
So 741686-50-0 is a valid CAS Registry Number.

741686-50-0Relevant articles and documents

Sugar-modified derivatives of cytostatic 6-(het)aryl-7-deazapurine nucleosides: 2′-c-methylribonucleosides, arabinonucleosides and 2′-deoxy-2′-fluoroarabinonucleosides

Naus, Petr,Perlikova, Pavla,Pohl, Radek,Hocek, Michal

experimental part, p. 957 - 988 (2012/06/16)

A series of novel sugar-modified derivatives of cytostatic 6-hetaryl-7-deazapurine ribonucleo-sides: 2′-C-methylribonucleosides, arabinonucleosides and 2′-deoxy-2′-fluoroarabinonucleo-sides bearing an alkyl, aryl and hetaryl group in position 6 were prepared by palladium catalyzed cross-coupling reactions of corresponding (protected) 6-chloro-(7-fluoro)-7-deazapurine nucleosides with (het)arylboronic, hetarylstannanes and trimethylaluminium eventually followed by deprotection. Key intermediate 6-chloro-7-deazapurine 2′-C-methyl-β-D-ribofuranoside was prepared via a stereoselective nucleobase anion glycosylation with toluoyl-protected 1,2-anhydro-2-C-methylribofuranose. The 1,2-anhydro sugar was synthesized in 3 steps starting from readily available 2-C-methylribonolactone. The 6-chloro-7-deazapurine arabinofuranoside intermediate was obtained by epimerization from 3′,5′-protected 6-chloro-7-deazapurine ribofuranoside via 2′-hydroxyl oxidation followed by reduction. None of the prepared compounds showed any considerable cytostatic or antiviral activity.

Practical synthesis of a potent hepatitis C virus RNA replication inhibitor

Bio, Matthew M.,Xu, Feng,Waters, Marjorie,Williams, J. Michael,Savary, Kimberly A.,Cowden, Cameron J.,Yang, Chunhua,Buck, Elizabeth,Song, Zhiguo J.,Tschaen, David M.,Volante,Reamer, Robert A.,Grabowski, Edward J. J.

, p. 6257 - 6266 (2007/10/03)

A practical, efficient synthesis of 1, a hepatitis C virus RNA replication inhibitor, is described. Starting with the inexpensive diacetone glucose, the 12-step synthesis features a novel stereoselective rearrangement to prepare the key crystalline furanose diol intermediate. This is followed by a highly selective glycosidation to couple the C-2 branched furanose epoxide with deazapurine.

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