Enantioselective α-Functionalization of 1,3-Dithianes by Iridium-Catalyzed Allylic Substitution
作者:Panpan Wang、Qian Jiang、Ruibo Zhao、Xingang Xie、Shouchu Tang、Xiaolei Wang
DOI:10.1021/acs.joc.0c01683
日期:2020.10.2
iridium-catalyzed asymmetric allylicsubstitution reaction with 2-alkoxy carbonyl-1,3-dithianes has been achieved with high regio- and enantioselectivities. The transformation provides a new method for the enantioselective α-functionalization of dithianes. The corresponding dithiane-containing products are easily converted into many other derivatives with high yields and enantioselectivities.
申请人:University of Georgia Research Foundation, Inc.
公开号:US09309276B2
公开(公告)日:2016-04-12
The invention provides functionalized monosaccharides and disaccharides suitable for use in synthesizing a lipid A derivative, as well as methods for synthesizing and using a synthetic lipid A derivative.
这项发明提供了适用于合成脂多糖A衍生物的功能化单糖和双糖,以及合成和使用合成脂多糖A衍生物的方法。
SYNTHETIC LIPID A DERIVATIVE
申请人:Boons Geert-Jan
公开号:US20100221269A1
公开(公告)日:2010-09-02
The invention provides functionalized monosaccharides and disaccharides suitable for use in synthesizing a lipid A derivative, as well as methods for synthesizing and using a synthetic lipid A derivative.
这项发明提供了适用于合成脂多糖A衍生物的功能化单糖和双糖,以及合成和使用合成脂多糖A衍生物的方法。
Innate Immune Responses of Synthetic Lipid A Derivatives ofNeisseria meningitidis
作者:Yanghui Zhang、Jidnyasa Gaekwad、Margreet A. Wolfert、Geert-Jan Boons
DOI:10.1002/chem.200701165
日期:2008.1.7
macrophages were exposed to the synthetic compound and its parent LOS, E. coli lipid A (2), and a hybrid derivative (4) that has the asymmetrical acylation pattern of E. coli lipid A, but the shorter lipids of meningococcal lipid A. The resulting supernatants were examined for tumor necrosis factor alpha (TNF-alpha) and interferon beta (IFN-beta) production. The lipid A derivative containing KDO was much more
脑膜炎奈瑟菌脂多糖 (LOS) 和大肠杆菌脂多糖 (LPS) 的脂质 A 的脂肪酸模式和化学性质的差异可能是炎症特性差异的原因。此外,有迹象表明 LOS 和 LPS 的二聚 3-脱氧-D-甘露糖-oct-2-ulosonic 酸 (KDO) 部分增强了生物活性。脂质 A 结构的异质性和可能与其他炎症成分的污染使得这些观察结果难以证实。为了解决这些问题,已经开发了一种高度收敛的合成含有 KDO 的脂质 A 衍生物的方法,该方法依赖于以顺序方式选择性去除或揭露异亚丙基缩醛、9-芴基甲氧基羰基 (Fmoc)、烯丙氧基碳酸酯的能力。 Alloc)、叠氮化物、和二甲基甲硅烷基 (TDS) 醚。该策略用于合成含有 KDO 的脑膜炎奈瑟球菌脂质 A (3)。小鼠巨噬细胞暴露于合成化合物及其亲本 LOS、大肠杆菌脂质 A (2) 和具有大肠杆菌脂质 A 不对称酰化模式但脑膜炎球菌脂质 A 的较短脂质的杂化衍生物
Amino acid derivatives as antihypertensives
申请人:Merck & Co., Inc.
公开号:US04472380A1
公开(公告)日:1984-09-18
There are disclosed processes for preparing carboxyalkyl dipeptide derivatives and related compounds which are useful as angiotension converting enzyme (ACE) inhibitors and as antihypertensives and pharmaceutical compositions containing these carboxyalkyl dipeptide compounds in combination with another antihypertensive and/or diuretic compound.