[EN] SUBSTITUTED 2-PYRIDONE TRICYCLIC COMPOUNDS, ANALOGUES THEREOF, AND METHODS USING SAME [FR] COMPOSÉS TRICYCLIQUES 2-PYRIDONE SUBSTITUÉS, ANALOGUES DE CEUX-CI, ET PROCÉDÉS LES UTILISANT
The synthesis of novel matrix metalloproteinase inhibitors employing the Ireland-Claisen rearrangement
摘要:
Matrix metalloproteinase inhibitors of general formula (1) were synthesised by a route involving an Ireland-Claisen rearrangement which enables systematic modification of the substituent alpha to the hydroxamic acid. An analogue (12c) possessing an alpha-cyclopentyl group is a potent broad spectrum inhibitor that displays high and sustained blood levels following oral dosing in both the rat and marmoset ex-vivo bioassays. This compound and analogues are also potent inhibitors of TNF alpha release. (C) 1998 Elsevier Science Ltd. All rights reserved.
The first stereoselectivesynthesis of Certonardolsterol D3 was described. Ene reaction and improved allylic oxidation were employed as key steps for efficient construction of the desired 3β,6α,15β-triol steroidal framework. The chiral side chain in Certonardolsterol D3 was finally introduced by Julia olefination.
描述了Certonardolsterol D 3的第一个立体选择性合成。烯反应和改进的烯丙基氧化被用作有效构建所需的3β,6α,15β-三醇甾体骨架的关键步骤。最后,通过朱莉娅烯化反应引入了Certonardolsterol D 3中的手性侧链。
Total synthesis and absolute stereochemistry of the proteasome inhibitors cystargolides A and B
作者:Rodolfo Tello-Aburto、Liam P. Hallada、Doleshwar Niroula、Snezna Rogelj
DOI:10.1039/c5ob01821h
日期:——
The absolute stereochemistry of the cystargolides was determined by totalsynthesis. Evaluation of synthetic cystargolides and derivatives showed that the natural (2S,3R) stereochemistry is essential for activity. Moreover, benzyl esters (−)-10 and (−)-15 were found to be about 100 times more potent, and to selectively kill MCF-7 cancerous cells.