Phorboxazole compounds and methods of their preparation
申请人:The Trustees of the University of Pennsylvania
公开号:US07485631B2
公开(公告)日:2009-02-03
Novel macrolactone compounds, their methods of preparation, pharmaceutical compositions containing these compounds, and methods for their pharmaceutical use are disclosed. In certain embodiments, the macrolactone compounds may be useful, inter alia, for treating various cancers, inducing apoptosis in malignant cells, or inhibiting cancer cell division.
Total Synthesis of Iso- and Bongkrekic Acids: Natural Antibiotics Displaying Potent Antiapoptotic Properties
作者:Antoine Français、Antonio Leyva-Pérez、Gorka Etxebarria-Jardi、Javier Peña、Steven V. Ley
DOI:10.1002/chem.201002380
日期:2011.1.3
decades, owing to their antiapoptotic activities, bongkrekic and isobongkrekic acids have generated interest from the scientific community. Here, we disclose full details of our investigation into the synthesis of isobongkrekic acid, which culminated in its first preparation and features various palladium‐catalysed cross‐couplings and Takai olefination reactions. Access to bongkrekic acid is also reported
Palladium-catalyzed carbonylation of 2,4-enyne carbonates in an alcohol and under balloon pressure of CO proceeds through 1,5-substitution to yield (E)-2,3,5-trienoates. The olefin geometry of the substrate is important to control the overall stereochemistry of this alkoxycarbonylation method. The reaction proceeds through successive formation of π-allylpalladium with an R3 group oriented syn and σ-allenyl
Intramolecular Pyridone/Enyne Photocycloaddition: Partitioning of the [4 + 4] and [2 + 2] Pathways
作者:Svitlana Kulyk、William G. Dougherty、W. Scott Kassel、Michael J. Zdilla、Scott McN. Sieburth
DOI:10.1021/ol200390j
日期:2011.5.6
Intramolecular photocycloaddition (>290 nm) between a 1,3-enyne and a 2-pyridone is far more selective than the intermolecular version; a three-atom linkage both controls regiochemistry and separates the [2 + 2] and [4 + 4] pathways. All four head-to-head, head-to-tail, tail-to-head, and tail-to-tail tetherings have been investigated. Linkage via the ene of the enyne leads to [2 + 2] products regardless
作者:Florian Kleinbeck、Gabriela J. Fettes、Lee D. Fader、Erick M. Carreira
DOI:10.1002/chem.201102797
日期:2012.3.19
A convergent synthesis of bafilomycin A1, a potent inhibitor of V‐type ATPases, is presented. The synthesis relies on the zinc triflate mediated diastereoselective addition of a complex enyne to a sensitive aldehyde as the key fragment coupling. A ruthenium‐catalyzed trans‐reduction of the resulting propargylic enyne efficiently installs the required C10–C13 trans,trans‐diene subunit, implementing
介绍了bafilomycin A 1的收敛合成,bafilomycin A 1是V型ATP酶的有效抑制剂。合成依赖于三氟甲磺酸锌介导的复杂烯炔向非对映体的非对映选择性加成,作为关键片段偶联的敏感醛。钌催化的炔丙基炔的反还原可有效地安装所需的C10–C13反式,反式二烯亚单元,从而实现了传统钯催化交叉偶联策略的替代策略。三元醇中仲羟基的高度选择性氧化为合成完成奠定了基础。