123-78-4Relevant articles and documents
An efficient synthesis of D-erythro- and D-threo-sphingosine from D-glucose: Olefin cross-metathesis approach
Chaudhari, Vinod D.,Ajish Kumar,Dhavale, Dilip D.
, p. 5805 - 5807 (2005)
(Chemical Equation Presented) The D-erythro- and D-threo-sphingosine were synthesized via E-selective olefin cross-metathesis using a D-glucose-derived building block and long-chain terminal alkene.
Highly Diastereoselective Synthesis of D-threo- and D-erythro-Sphingosine from Glycidol
Katsumura, Shigeo,Yamamoto, Noriyoshi,Fukuda, Etsuko,Iwama, Seiji
, p. 393 - 394 (1995)
D-Threo- and D-erythro-sphingosine, (1) and (2), inhibitors of protein kinase C, have been efficiently synthesized from glycidol through (R)-4-methoxycarbonyloxazolidinone (3) by selective mono-alkylation followed by highly diastereoselective reduction of the tin-substituted pentadecenyl ketone 5.
Amplification of a FRET Probe by Lipid–Water Partition for the Detection of Acid Sphingomyelinase in Live Cells
Pinkert, Thomas,Furkert, David,Korte, Thomas,Herrmann, Andreas,Arenz, Christoph
, p. 2790 - 2794 (2017)
Real-time monitoring of acid sphingomyelinase (ASM) activity is crucial for investigating its role in lipid-mediated signaling processes. In this study, we synthesized fluorescent phosphosphingolipids capable of FRET by phosphorodichloridate chemistry. These sphingomyelin analogues are substrates for recombinant human ASM and can be used to monitor ASM activity by fluorescence spectroscopy. Incubation with cell lysates from wild-type and knock-out mice further confirmed probe cleavage to be exclusive to ASM. We also systematically exploited the environmental sensitivity of the fluorophores to achieve significant increases in responsiveness. This concept may be transferred to other lipid probes in the future. The ASM activity in live cells was imaged by two-photon-excitation microscopy.
N-Metallocenoylsphingosines as targeted ceramidase inhibitors: Syntheses and antitumoral effects
Klatt, Felix,Kuhn, Claus-D.,Rothemund, Matthias,Schobert, Rainer,Unverzagt, Carlo,Weidler, Sascha,B?r, Alexander,K?hler, Leonhard
, (2020)
Three N-metallocenoylsphingosines with variance in the central metal (Fe, Co, Ru), the charge (neutral or cationic), and the arene ligands (Cp2, Cp*Ph) were synthesized from serine and metallocene carboxylic acids as substrate-analogous inhibit
Divergent synthesis of diastereomeric sphingosines from a chiral aziridine
Kang, On-Yu,Shin, Mi-Ri,Kang, Han-Young
, p. 1095 - 1104 (2016)
All four stereoisomers of sphingosines were synthesized starting from a single intermediate, chiral aziridine (2), which was efficiently prepared by enzymatic desymmetrization in an enatiopure form. Aziridine (2) was converted to 3, which was used for the synthesis of 4. Both the advanced key intermediates, vinylaziridines 3 and 4, were successfully converted to threo-sphingosines 1a and 1b, respectively. Ring-closing metathesis (RCM) using the Grubbs II catalyst was the key reaction in the synthesis. Two erythro-sphingosines 1c and 1d were synthesized by the ring-expansion reactions of vinylaziridines 3 and 4, followed by RCM reactions. The successful divergent synthesis confirmed that chiral vinylaziridine 2 can be used as a key intermediate for the synthesis of sphingosine-related natural products.
A short enantiodivergent synthesis of D-erythro and L-threo sphingosine
Khiar, Noureddine,Singh, Kamaljit,Garcia, Mercedes,Martin-Lomas, Manuel
, p. 5779 - 5782 (1999)
A new, short (6 steps) and efficient enantiodivergent route to both D-erythro and L threo-sphingosine I and II is disclosed. The high diastereoselection (100% de) reached in the creation of the C-3 stereocenter relies on the use of a sulfoxide as chiral controlling agent in the reduction of the common precursor β-keto sulfoxide 3. The desired E-alkene of sphingosines has been constructed by the Schlosser modification of the Wittig reaction between the aldehyde 8 and the phosphonium salt 9. The reported methodology can easily be extended to the synthesis of a large number of optically pure syn and anti amino alcohols starting from commercially available amino acids.
New cytotoxic cerebrosides from the red sea cucumber Holothuria spinifera supported by in-silico studies
Abdelhameed, Reda F.A.,Eltamany, Enas E.,Hal, Dina M.,Ibrahim, Amany K.,AboulMagd, Asmaa M.,Al-Warhi, Tarfah,Youssif, Khayrya A.,Abd El-Kader, Adel M.,Hassanean, Hashim A.,Fayez, Shaimaa,Bringmann, Gerhard,Ahmed, Safwat A.,Abdelmohsen, Usama Ramadan
, (2020/09/07)
Bioactivity-guided fractionation of a methanolic extract of the Red Sea cucumber Holothuria spinifera and LC-HRESIMS-assisted dereplication resulted in the isolation of four compounds, three new cerebrosides, spiniferosides A (1), B (2), and C (3), and cholesterol sulfate (4). The chemical structures of the isolated compounds were established on the basis of their 1D NMR and HRMS spectral data. Metabolic profiling of the H. spinifera extract indicated the presence of diverse secondary metabolites, mostly hydroxy fatty acids, diterpenes, triterpenes, and cerebrosides. The isolated compounds were tested for their in vitro cytotoxicities against the breast adenocarcinoma MCF-7 cell line. Compounds 1, 2, 3, and 4 displayed promising cytotoxic activities against MCF-7 cells, with IC50 values of 13.83, 8.13, 8.27, and 35.56 μM, respectively, compared to that of the standard drug doxorubicin (IC50 8.64 μM). Additionally, docking studies were performed for compounds 1, 2, 3, and 4 to elucidate their binding interactions with the active site of the SET protein, an inhibitor of protein phosphatase 2A (PP2A), which could explain their cytotoxic activity. This study highlights the important role of these metabolites in the defense mechanism of the sea cucumber against fouling organisms and the potential uses of these active molecules in the design of new anticancer agents.
Synthesis of Gb3 Glycosphingolipids with Labeled Head Groups: Distribution in Phase-Separated Giant Unilamellar Vesicles
Sibold, Jeremias,Kettelhoit, Katharina,Vuong, Loan,Liu, Fangyuan,Werz, Daniel B.,Steinem, Claudia
supporting information, p. 17805 - 17813 (2019/11/13)
The receptor lipid Gb3 is responsible for the specific internalization of Shiga toxin (STx) into cells. The head group of Gb3 defines the specificity of STx binding, and the backbone with different fatty acids is expected to influence its localization within membranes impacting membrane organization and protein internalization. To investigate this influence, a set of Gb3 glycosphingolipids labeled with a BODIPY fluorophore attached to the head group was synthesized. C24 fatty acids, saturated, unsaturated, α-hydroxylated derivatives, and a combination thereof, were attached to the sphingosine backbone. The synthetic Gb3 glycosphingolipids were reconstituted into coexisting liquid-ordered (lo)/liquid-disordered (ld) giant unilamellar vesicles (GUVs), and STx binding was verified by fluorescence microscopy. Gb3 with the C24:0 fatty acid partitioned mostly in the lo phase, while the unsaturated C24:1 fatty acid distributes more into the ld phase. The α-hydroxylation does not influence its partitioning.