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110567-23-2

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  • (1S,2S,3S,5S)-5-Azido-3-(phenylmethoxy)-2-[(phenylmethoxy)methyl]cyclopentanol

    Cas No: 110567-23-2

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110567-23-2 Usage

Chemical Properties

Colorless Oil

Check Digit Verification of cas no

The CAS Registry Mumber 110567-23-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,0,5,6 and 7 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 110567-23:
(8*1)+(7*1)+(6*0)+(5*5)+(4*6)+(3*7)+(2*2)+(1*3)=92
92 % 10 = 2
So 110567-23-2 is a valid CAS Registry Number.

110567-23-2Relevant articles and documents

Synthesis of [13C4]Baraclude (entecavir)

Tran, Scott B.,Ekhato, Ihoezo V.,Rinehart, J. Kent

scheme or table, p. 485 - 489 (2010/07/04)

Entecavir, labeled as 1H-[13C4]purin-6(9H)-one, was prepared from commercially available [13C]guanidine HCl, 1 and diethyl [1,2,3-13C3]malonate, 2. The reagents were condensed together to give 2-amino-4,6-dichloro[2,4,5,6-13C 4]pyrimidine 3, which in turn was coupled to an optically active amino cyclopentanol derivative, 9. A further sequence of eight reaction steps completed the constructions of the purine ring system and the exocyclic olefin attachment on the cyclic pentyl portion, 18. The removal of the methoxide and benzyl protecting groups gave [13C4]entecavir, 20 in an overall yield of 6.8%. The chemical purity of the title compound was determined by HPLC to be 99.23%. The percent isotopic [13C4] abundance was found by mass spectral analysis to be 96.7%. No detectable level of the unlabeled entecavir was found by LC-MS analysis. Copyright

Use of Diethylaminosulphur Trifluoride (DAST) in the Preparation of Synthons of Carbocyclic Nucleosides

Biggadike, Keith,Borthwick, Alan D.,Evans, Derek,Exall, Anne M.,Kirk, Barrie E.,et al.

, p. 549 - 554 (2007/10/02)

Diethylaminosulphur trifluoride (DAST) converted the protected amino triol (4) into the fluorine-containing compounds (8) and (10).The same reagent converted the alcohol (9) into compounds (10), (5), and (11) and transformed the azido alcohol (15) into the fluoroazides (16) and (19).The fluorinated compounds (5), (8), and (16) are useful synthons for fluorocarbocyclic nucleosides.The effect of neighbouring groups on the course of some DAST reactions is discussed.

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