- Chiral combinatorial preparation and biological evaluation of unique ceramides for inhibition of sphingomyelin synthase
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Enantiomers or diastereomers of chiral bioactive compounds often exhibit different biological and toxicological properties. Here, we report the efficient synthesis of four stereoisomers of sphingosine and derivatization of unique chiral ceramides through a combinatorial chemistry by solid-phase activated resin ester. In addition, to test the effectivity of stereochemistry of ceramide, we demonstrated a cell-based assay of sphingomyelin synthase inhibition in the presence ofchiral unique ceramides, which suggested that libraries of this sort will be a rich source of biologically active synthetic molecules.
- Koolath, Sajeer,Monde, Kenji,Murai, Yuta,Suga, Yoshiko
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supporting information
(2020/02/04)
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- The synthesis and biological characterization of a ceramide library
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A facile synthesis of a combinatorial ceramide library and their activities in the NF-κB pathway and in apoptosis induction/prevention were demonstrated. A novel NF-κB activating molecule was discovered among ceramide containing β-galactose, and the structural requirements of ceramides for apoptosis induction was elucidated. Copyright
- Chang, Young-Tae,Choi, Jaehwa,Ding, Sheng,Prieschl, Eva E.,Baumruker, Thomas,Lee, Jae-Mok,Chung, Sung-Kee,Schultz, Peter G.
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p. 1856 - 1857
(2007/10/03)
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- Syntheses of two pairs of enantiomeric C18-sphingosines and a palmitoyl analogue of gaucher spleen glucocerebroside
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Sixteen kinds of chiral C4-epoxides [(-)-10a-d,(+)-10a-d,(-)-11a-d,(+)-11a-d], which are synthons in our synthetic strategy for complex lipids, have been prepared from (2Z)-2-butene-1,4-diol (6) by employing a Sharpless asymmetric epoxidation. By using the chiral C4-epoxides [(+)-10a,(-)-10a,(-)-11a,(+)-11a] as starting compounds, two pairs of enantiomeric (D-erythro, L-erythro, D-threo, and L-threo)-C18-sphingosines (1, 2, 3, 4) have been synthesized via a regioselective ring-opening of the epoxide ring with azide anion followed by reduction of the azide group to an amino group and a Wittig reaction. Furthermore, D-erythro-C18-sphingosine (1) has been converted to a palmitoyl analogue (5a) of Gaucher spleen glucocerebroside (5) through a reaction pathway including successive condensations with palmitic acid and D-glucose.
- Shibuya,Kawashima,Narita,Ikeda,Kitagawa
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p. 1154 - 1165
(2007/10/02)
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- A novel, efficient synthesis of (±)-erythro-sphingosine
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A stereoselective synthesis of (±)-erythro-sphingosine triacetate (1) is described. The key reaction that determines the right stereochemistry is the iodocyclization of 1-trichloroacetimido-(2E,4E)-octadecadiene (5). The 4,5-dihydro-1,3-oxazine (6) through cleavage with HCl and treatment with Amberlyst A 26 in the AcO- form, followed by full acetylation, affords (1) in good yield.
- Cardillo,Orena,Sandri,Tomasini
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p. 917 - 922
(2007/10/02)
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