AMPHOTERICIN B DERIVATIVES WITH IMPROVED THERAPEUTIC INDEX
申请人:THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ILLINOIS
公开号:US20160215012A1
公开(公告)日:2016-07-28
Provided are certain derivatives of amphotericin B (AmB) characterized by reduced toxicity and retained anti-fungal activity. Certain of the derivatives are C16 urea derivatives of AmB. Certain of the derivatives are C3, C5, C8, C9, C11, C13, or C15 deoxy derivatives of AmB. Certain of the derivatives include C3′ or C4′ modifications of the mycosamine appendage of AmB. Also provided are methods of making AmB derivatives of the invention, pharmaceutical compositions comprising AmB derivatives of the invention, and methods of use of AmB derivatives of the invention.
Peridinin Is an Exceptionally Potent and Membrane-Embedded Inhibitor of Bilayer Lipid Peroxidation
作者:Hannah M. S. Haley、Adam G. Hill、Alexander I. Greenwood、Eric M. Woerly、Chad M. Rienstra、Martin D. Burke
DOI:10.1021/jacs.8b06933
日期:2018.11.14
carotenoid natural products produced by microorganisms that thrive in environments of extreme oxidative stress, we found that peridinin is a potent inhibitor of nonenzymatic bilayer lipid peroxidation in liposomes and in primary human endothelial cells. We also found that peridinin blocks monocyte-endothelial cell adhesion, a key step in atherogenesis. A series of frontier solid-state NMR experiments with
抗脂过氧化蛋白功能障碍与许多人类疾病有关,这表明双层脂质过氧化可能对发病机制有广泛的影响。这种膜局部化学的小分子抑制剂理论上可以更好地理解和/或治疗此类疾病,但目前可用的化合物具有重要的局限性。因此,许多生物学问题仍未得到解答,临床试验也基本上令人失望。通过对在极端氧化应激环境中生长的微生物产生的三种非典型类胡萝卜素天然产物进行高效、基于构建块的合成,我们发现多甲素是脂质体和原代人内皮细胞中非酶双层脂质过氧化的有效抑制剂。我们还发现多甲素可阻断单核细胞与内皮细胞的粘附,这是动脉粥样硬化形成的关键步骤。使用相同的基于 MIDA 硼酸酯结构单元的全合成方法合成的位点特异性 13C 标记同位素同位素进行的一系列前沿固态 NMR 实验表明,多甲素完全嵌入并物理跨越 POPC 膜的疏水核心,从而最大限度地提高了其疏水性。目标脂质过氧化反应部位的有效摩尔浓度。另外,广泛使用的类胡萝卜素虾青素的效力明显
1,6-Addition of Tertiary Carbon Radicals Generated From Alcohols or Carboxylic Acids by Visible-Light Photoredox Catalysis
作者:Samir Y. Abbas、Peng Zhao、Larry E. Overman
DOI:10.1021/acs.orglett.7b04034
日期:2018.2.2
The addition of tertiary carbon radicals generated by an Ir-catalyzed visible-light photocatalyst to electron-deficient 1,3-dienes proceeds in good yields to append a δ-substituted β,γ-unsaturated carbonyl fragment to a tertiary alcohol or carboxylicacid precursor and construct a new quaternary carbon center.
Kinetic resolutions and kineticasymmetrictransformations (KAT) as well as dynamickinetic resolutions and dynamickineticasymmetrictransformations (DYKAT) are important synthetic protocols. The feasibility of KAT and DYKAT processes for asymmetric allylic alkylations (AAA) is explored utilizing a single substrate--conduritol B tetraesters. Both processes can be performed resulting in excellent