120806-96-4Relevant articles and documents
Synthesis and biological evaluation of (-)-kainic acid analogues as phospholipase D-coupled metabotropic glutamate receptor ligands
Zanato, Chiara,Watson, Sonia,Bewick, Guy S.,Harrison, William T. A.,Zanda, Matteo
, p. 9638 - 9643 (2014)
(-)-Kainic acid potently increases stretch-induced afferent firing in muscle spindles, probably acting through a hitherto uncloned phospholipase D (PLD)-coupled mGlu receptor. Structural modification of (-)-kainic acid was undertaken to explore the C-4 substituent effect on the pharmacology related to muscle spindle firing. Three analogues 1a-c were synthesised by highly stereoselective additions of a CF3, a hydride and an alkynyl group to the Re face of the key pyrrolidin-4-one intermediate 5a followed by further structural modifications. Only the 4-(1,2,3-triazolyl)-kainate derivative 1c retained the kainate-like agonism, increasing firing in a dose-dependent manner. Further modification of 1c by introduction of a PEG-biotin chain on the 1,2,3-triazole fragment afforded compound 14 which retained robust agonism at 1 μM and appears to be suitable for future use in pull-down assays and far western blotting for PLD-mGluR isolation. This journal is
Synthesis of (1R,4R)-2,5-diazabicyclo[2.2.1]heptane derivatives by an epimerization-lactamization cascade reaction
Cui, Benqiang,Yu, Jie,Yu, Fu-Chao,Li, Ya-Min,Chang, Kwen-Jen,Shen, Yuehai
, p. 10386 - 10392 (2015/01/30)
An epimerization-lactamization cascade of functionalized (2S,4R)-4-aminoproline methyl esters is developed and applied in synthesizing (1R,4R)-2,5-diazabicyclo[2.2.1]heptane (DBH) derivatives. (2S,4R)-4-Aminoproline methyl esters are likely to undergo 2-epimerization under basic conditions, followed by an intramolecular aminolysis of the (2R)-epimer to form the bridged lactam intermediates. Key factors identified for this cascade reaction include the electron-withdrawal N-protective group in the substrates and a strong base as the promoter.
Synthetic study of optically active 3-azabicyclo[3.3.0]octane-2,6,8- tricarboxylic acid
Arakawa, Yasushi,Ohnishi, Masafumi,Yoshimura, Norikazu,Yoshifuji, Shigeyuki
, p. 1015 - 1020 (2007/10/03)
Synthesis of (1R,2S,5S,6R,8S)-3-azabicyclo[3.3.0]octane-2,6,8-tricarboxylic acid (2) from trans-4-hydroxy-L-proline (5) was attempted. A Diels-Alder reaction of 3,4-dehydroproline derivative 9 and cyclopentadiene afforded a single stereoisomer 11. The Diels-Alder adduct was smoothly converted to the hydrochloride of 2 (24) via RuO4 oxidation. Although some racemization of the material or product was observed during the synthetic processes, the amino acid 24 proved to be optically pure.