title: 3,4-Disubstituted oxazolidin-2-ones as constrained ceramide analogs with anticancer activities.
abstract: Heterocyclic analogs of ceramide as 3-alkanoyl or benzoyl-4-(1-hydroxy-2-enyl)-oxazolidin-2-ones were designed by binding of primary alcohol and amide in sphinogosine backbone as a carbamate. They were synthesized by addition of acyl halide to the common ring 4-(1-t-butyldimethylsilyloxyhexadec-2-enyl)-oxazolidin-2-one which was elaborated from chiral aziridine-2-carboxylate including stereoselective reduction and ring opening reactions as key steps. Other analogs with different carbon frame at C4 position which is corresponding to the sphingoid backbone were prepared from 3-cyclopentanecarbonyl-4-(1-t-butyldimethylsilyloxybut-2-enyl)-oxazolidin-2-one and straight and cyclic alkenes by cross metathesis. All compounds were tested as antileukemic drugs against human leukemia HL-60 cells. Many of them including propionyl, cyclopentanoyl and p-nitrobenzoyl-4-(1-hydroxyhexadec-2-enyl)-oxazolidin-2-ones showed better antileukemic activities than natural C2-ceramide with good correlation between cell death and DNA fragmentation. There is a drastic change of the activities by the carbon chain lengths at C4 position. Cytotoxicity was induced by caspase activation without significant accumulation of endogenous ceramide concentration or any perturbation of ceramide metabolism.
authors: Department of Chemistry, Hankuk University of Foreign Studies, Yongin 449-791, Republic of Korea.
authors: Alok
authors: A
authors: Singh
authors: Hyun-Joon
authors: HJ
authors: Ha
authors: Jungchan
authors: J
authors: Park
authors: Jun Hee
authors: JH
authors: Kim
authors: Won Koo
authors: WK
authors: Lee
mesh_terms: D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D017209:Apoptosis / Q000187:drug effects; D001388:Aziridines / Q000737:chemistry*; D002470:Cell Survival / Q000187:drug effects; D002518:Ceramides / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D053938:DNA Fragmentation / Q000187:drug effects; D018922:HL-60 Cells; D006801:Humans; D007938:Leukemia / Q000188:drug therapy* / Q000473:pathology; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D023303:Oxazolidinones / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D021241:Spectrometry, Mass, Electrospray Ionization; D013329:Structure-Activity Relationship
chemical_list: D000970:Antineoplastic Agents; D001388:Aziridines; D002518:Ceramides; D023303:Oxazolidinones; C073440:aziridine-2-carboxylic acid