Synthesis and SAR of succinamide peptidomimetic inhibitors of cathepsin S
作者:Arnab K. Chatterjee、Hong Liu、David C. Tully、Jianhua Guo、Robert Epple、Ross Russo、Jennifer Williams、Michael Roberts、Tove Tuntland、Jonathan Chang、Perry Gordon、Thomas Hollenbeck、Christine Tumanut、Jun Li、Jennifer L. Harris
DOI:10.1016/j.bmcl.2007.02.049
日期:2007.5
Peptidic, non-covalent inhibitors of lysosomal cysteine protease cathepsin S (1 and 2) were investigated due to low oralbioavailability, leading to an improved series of peptidomimetic inhibitors. Utilizing phenyl succinamides as the P2 residue increased the oral exposure of this lead series of compounds, while retaining selective inhibition of the cathepsin S isoform. Concurrent investigation of
The Daphniphyllum Alkaloids: Total Synthesis of (−)-Calyciphylline N
作者:Artem Shvartsbart、Amos B. Smith
DOI:10.1021/ja503899t
日期:2015.3.18
Presented here is a full account on the development of a strategy culminating in the first totalsynthesis of the architecturally complex daphniphyllumalkaloid, (−)-calyciphylline N. Highlights of the approach include a highly diastereoselective, intramolecular Diels–Alder reaction of a silicon-tethered acrylate; an efficient Stille carbonylation of a sterically encumbered vinyl triflate; a one-pot
这里介绍的是对结构复杂的瑞香生物碱 (−)-calyciphylline N 的首次全合成策略的开发的完整描述。该方法的亮点包括硅-的高度非对映选择性、分子内 Diels-Alder 反应。系链丙烯酸酯;空间阻碍的乙烯基三氟甲磺酸酯的高效 Stille 羰基化;一锅纳扎罗夫环化/原脱甲硅烷基化序列;以及完全取代的二烯酯的化学选择性氢化。
Synthesis of (R)-ar-turmerone and its conversion to (R)-ar-himachalene, a pheromone component of the flea beetle: (R)-ar-himachalene is dextrorotatory in hexane, while levorotatory in chloroform
作者:Kenji Mori
DOI:10.1016/j.tetasy.2004.11.077
日期:2005.2
(R)-ar-Turmerone was synthesized from (4-methylphenyl)acetic acid by employing Evans asymmetric alkylation as the key step. (R)-ar-Turmerone was converted to (R)-ar-himachalene, which was dextrorotatory in hexane while levorotatory in chloroform. Enantiomerically impure (75% ee) (R)-3-(4-methylphenyl)butanoic acid crystallized more readily than the enantiomerically pure one.
synthesis of the architecturally complex Daphniphyllum alkaloid (-)-calyciphylline N has been achieved. Highlights of the synthesis include a Et2AlCl-promoted, highly stereoselective, susbtrate-controlled intramolecular Diels-Alder reaction, a transannular enolate alkylation, an effective Stille carbonylation/Nazarov cyclization sequence, and a high-risk diastereoselective hydrogenation of a fully substituted
Provided herein is an LpxC inhibitor compound, as well as methods of making and pharmaceutical compositions comprising said compound, and methods of use thereof in the treatment of disease that would benefit from treatment with an LpxC inhibitor, including gram-negative bacterial infections such as urinary tract infections and the like.