[EN] CYCLIC CYANOENONE DERIVATIVES AS MODULATORS OF KEAP1<br/>[FR] DÉRIVÉS DE CYANOÉNONE CYCLIQUES UTILISÉS EN TANT QUE MODULATEURS DE KEAP1
申请人:MERCK SHARP & DOHME
公开号:WO2022013408A3
公开(公告)日:2022-03-17
Total syntheses of isonaamine C and isonaamidine E
作者:Heather M. Lima、Beatriz J. Garcia-Barboza、Nicole N. Khatibi、Carl J. Lovely
DOI:10.1016/j.tetlet.2011.08.030
日期:2011.11
The total syntheses of two alkaloids isolated from a marine sponge of the Leucetta sp. have been accomplished in 6 and 7 steps starting from a 4,5-diiodoimidazole derivative. Grignard mediated halogen-metal exchange was used to install the benzyl side chain. C2 substitution was accomplished via lithiation followed by quenching with trisyl azide which provided isonaamine C after hydrogenation. Isonaamidine E was then prepared from isonaamine C via introduction of the hydantoin ring by reaction with an activated parabanic acid derivative. (C) 2011 Elsevier Ltd. All rights reserved.
Total synthesis and cytotoxicity of Leucetta alkaloids
作者:Panduka B. Koswatta、Sabha Kasiri、Jayanta K. Das、Arunoday Bhan、Heather M. Lima、Beatriz Garcia-Barboza、Nicole N. Khatibi、Muhammed Yousufuddin、Subhrangsu S. Mandal、Carl J. Lovely
DOI:10.1016/j.bmc.2017.01.024
日期:2017.3
The total synthesis of a number of representative natural products isolated from Leucetta and Clathrina sponges containing a polysubstituted 2-aminoimidazole are described. These syntheses take advantage of the site specific metallation reactions of 4,5-diiodoimidazoles resulting in the syntheses of three different classes of Leucetta derived natural products. The cytotoxicities of these natural products