Synthesis of imifuramine and its stereoisomers exhibiting histamine H3-agonistic activity
摘要:
The four possible stereoisomers of a novel imidazole C-nucleoside derivative were synthesized by the efficient use of a PhSe group. Among them, (+)-4(5)-[(2R,5R)-5-(aminomethyl)tetrahydrofuran-2-yl]imidazole (imifuramine) was indicated as a novel type of histamine H-3-agonist by a brain microdialysis method. (C) 1999 Elsevier Science Ltd. All rights reserved.
Monoacylglycosylglycerols show anti-tumor promoting effects: in order to study the role of the ester function we have prepared by simple methods (R)-1-O-benzyl-1,2-decandiolk (R)-3-O-benzyl-1-O-hexyl-su-glycerol, and (R)-1-O-benzyl-5-oxo-1,2-decandiol; these optically active compounds are building blocks for the synthesis of monohexanoylglycosylglycerol isosters.
Drug Delivery by an Enzyme-Mediated Cyclization of a Lipid Prodrug with Unique Bilayer-Formation Properties
作者:Lars Linderoth、Günther H. Peters、Robert Madsen、Thomas L. Andresen
DOI:10.1002/anie.200805241
日期:2009.2.23
Special delivery: Liposomal drug‐delivery systems in which prodrugs are activated specifically by disease‐associated enzymes have great potential for the treatment of severe diseases, such as cancer. A new type of phospholipid‐based prodrug has the ability to form stable small unilamellar vesicles (see picture). Activation of the prodrug vesicles by the enzyme sPLA2 initiates a cyclization reaction
Svetamycins A–G, Unusual Piperazic Acid-Containing Peptides from <i>Streptomyces</i> sp.
作者:Denis Dardić、Gianluigi Lauro、Giuseppe Bifulco、Patricia Laboudie、Peyman Sakhaii、Armin Bauer、Andreas Vilcinskas、Peter E. Hammann、Alberto Plaza
DOI:10.1021/acs.joc.7b00228
日期:2017.6.16
amino acids including a rare 4,5-dihydroxy-2,3,4,5-tetrahydropyridazine-3-carboxylic acid, a γ-halogenated piperazic acid, and a novel δ-methylated piperazic acid in svetamycins B–C, E, and G. Moreover, isotope-labeled substrate feeding experiments demonstrated ornithine as the precursor of piperazic acid and that methylation at the δ position of the piperazyl scaffold is S-adenosyl-l-methionine (SAM)-dependent
Synthesis of Clavulones (Claviridenones) via [3+2] Annulation Using Reaction of (β-(Phenylthio)acryloyl)silane with Lithium Enolate of Alkyl Methyl Ketone
作者:Kei Takeda、Akemi Nakajima、Eiichi Yoshii
DOI:10.1055/s-1997-781
日期:1997.3
Synthesis of clavulones II (1) and III (2) (claviridenones c and b), antitumor marine prostanoids, has been achieved via [3+2] annulation using reaction of (β-(phenylthio)acryloyl)silane 5 with methyl ketone enolate 6 followed by installation of the α-side chain by aldol reaction.
克拉维酮 II (1) 和 III (2)(claviridenones c 和 b)、抗肿瘤海洋前列腺素类化合物的合成,已通过 (β-(苯硫基)丙烯酰基)硅烷 5 与甲基酮烯醇化物的反应通过 [3+2] 成环实现。 6 随后通过羟醛反应安装α-侧链。
Condensation of a Chiral Tetrahydro-2-furanthione with Diazocarbonyl Compounds
Reaction of (R)-5-(benzyloxymethyl)tetrahydro-2-furanthione (2), prepared from the corresponding furanone 1, with the diazocarbonyl compounds 3a-c in the presence of rhodium(II) acetate afforded the 2-(acylmethylene)tetrahydrofuran derivatives 4a-c in good yields.