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3,5-di-O-acetyl-1,2-O-isopropylidene-6-O-p-toluenesulfonyl-α-D-allofuranose is a complex organic compound with the molecular formula C20H24O9S. It is a derivative of α-D-allofuranose, a monosaccharide found in nature. The compound is characterized by the presence of two acetyl groups at the 3 and 5 positions, an isopropylidene group bridging the 1 and 2 positions, and a p-toluenesulfonyl group at the 6 position. This chemical structure is significant in the field of carbohydrate chemistry, as it represents a protected form of the sugar, which can be used in the synthesis of more complex carbohydrates and glycoconjugates. The protection groups, such as acetyl and p-toluenesulfonyl, are commonly used in organic synthesis to prevent unwanted reactions at specific functional groups, allowing for selective reactions at other sites. The isopropylidene group serves to protect the hydroxyl groups at the 1 and 2 positions, preventing them from participating in unwanted side reactions. 3,5-di-O-acetyl-1,2-O-isopropylidene-6-O-p-toluenesulfonyl-α-D-allofuranose is an example of the strategic use of protecting groups in organic synthesis, which is crucial for the preparation of complex molecules with specific functional groups intact.

5458-82-2

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5458-82-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 5458-82-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,4,5 and 8 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 5458-82:
(6*5)+(5*4)+(4*5)+(3*8)+(2*8)+(1*2)=112
112 % 10 = 2
So 5458-82-2 is a valid CAS Registry Number.

5458-82-2Relevant academic research and scientific papers

Synthesis and preclinical characterization of 1-(6′-deoxy-6′-[18F]fluoro-β-D-allofuranosyl)-2-nitroimidazole (β-6′-[18F]FAZAL) as a positron emission tomography radiotracer to assess tumor hypoxia

Wanek, Thomas,Kreis, Katharina,Kri?ková, Petra,Schweifer, Anna,Denk, Christoph,Stanek, Johann,Mairinger, Severin,Filip, Thomas,Sauberer, Michael,Edelhofer, Patricia,Traxl, Alexander,Muchitsch, Viktoria E.,Mereiter, Kurt,Hammerschmidt, Friedrich,Cass, Carol E.,Damaraju, Vijaya L.,Langer, Oliver,Kuntner, Claudia

, p. 5326 - 5339 (2016/10/22)

Positron emission tomography (PET) using fluorine-18 (18F)-labeled 2-nitroimidazole radiotracers has proven useful for assessment of tumor oxygenation. However, the passive diffusion-driven cellular uptake of currently available radiotracers results in slow kinetics and low tumor-to-background ratios. With the aim to develop a compound that is actively transported into cells, 1-(6′-deoxy-6′-[18F]fluoro-β-D-allofuranosyl)-2-nitroimidazole (β-[18F]1), a putative nucleoside transporter substrate, was synthetized by nucleophilic [18F]fluoride substitution of an acetyl protected labeling precursor with a tosylate leaving group (β-6) in a final radiochemical yield of 12?±?8% (n?=?10, based on [18F]fluoride starting activity) in a total synthesis time of 60?min with a specific activity at end of synthesis of 218?±?58?GBq/μmol (n?=?10). Both radiolabeling precursor β-6 and unlabeled reference compound β-1 were prepared in multistep syntheses starting from 1,2:5,6-di-O-isopropylidene-α-D-allofuranose. In vitro experiments demonstrated an interaction of β-1 with SLC29A1 and SLC28A1/2/3 nucleoside transporter as well as hypoxia specific retention of β-[18F]1 in tumor cell lines. In biodistribution studies in healthy mice β-[18F]1 showed homogenous tissue distribution and excellent metabolic stability, which was unaffected by tissue oxygenation. PET studies in tumor bearing mice showed tumor-to-muscle ratios of 2.13?±?0.22 (n?=?4) at 2?h after administration of β-[18F]1. In ex vivo autoradiography experiments β-[18F]1 distribution closely matched staining with the hypoxia marker pimonidazole. In conclusion, β-[18F]1 shows potential as PET hypoxia radiotracer which merits further investigation.

An improved synthesis of D-amicetose

Lajsic,Miljkovic,Cetkovic

, p. 261 - 264 (2007/10/02)

This paper reports on the acid-catalyzed ethanethiolysis of 3,5-di-O-acetyl-6-S-acetyl-1,2-O-isopropylidene-6-thio- α-D-glucofuranose and 3,5,6-tri-O-benzoyl-1,2-O-isopropylidene-α-D-glucofuranose.

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