Organocatalyzed Asymmetric Conjugate Addition of Heteroaryl and Aryl Trifluoroborates: a Synthetic Strategy for Discoipyrrole D
作者:Jiun‐Le Shih、Thien S. Nguyen、Jeremy A. May
DOI:10.1002/anie.201503528
日期:2015.8.17
Bis‐heteroaryl or bis‐aryl stereocenters were formed by an organocatalytic enantioselective conjugateaddition using the respective trifluoroborate salts as nucleophiles. Control studies suggested that fluoride dissociation is necessary in the anhydrous conditions. This strategy is applicable to the synthesis of discoipyrroleD, an inhibitor of BR5 fibroblast migration.
A water‐soluble palladium‐catalyzed Suzuki‐type cross‐coupling of aryltrifluoroborates with arylhydrazide hydrochlorides was efficiently developed under mild and environmentally benign conditions, in water without any ligand. The newly developed Pd/Cu co‐catalyzed denitrogenative reaction gave a range of structurally diverse substituted biaryls with good to excellent yields, in which the byproduct
Abstract A facile new synthetic method for the preparation of a Type-A 1-arylnaphthalene lactone skeleton was developed and used to synthesise justicidin B and several derivatives. Key synthesis steps included Hauser–Kraus annulation of a phthalide intermediate and Suzuki–Miyaura cross coupling between a triflated naphthalene lactone intermediate and various potassium organotrifluoroborates. With two
摘要 开发了一种制备 A 型 1-芳基萘内酯骨架的简便新合成方法,并将其用于合成 justicidin B 和几种衍生物。关键的合成步骤包括苯酞中间体的 Hauser-Kraus 环化和三氟萘内酯中间体与各种有机三氟硼酸钾之间的 Suzuki-Miyaura 交叉偶联。除了两个例外,这些衍生物对脂多糖 (LPS) 诱导的小鼠巨噬细胞中一氧化氮 (NO) 的产生显示出显着的抑制作用。此外,包括 justicidin B 在内的几种化合物对六种人类肿瘤细胞系具有显着的细胞毒性。
Palladium-Catalyzed Suzuki−Miyaura Cross-Coupling Reactions of Potassium Aryl- and Heteroaryltrifluoroborates
作者:Gary A. Molander、Betina Biolatto
DOI:10.1021/jo0342368
日期:2003.5.1
heteroaryltrifluoroborates in Suzuki-Miyaura cross-coupling reactions is presented. The coupling of aryl- and electron-rich heteroaryltrifluoroborates with aryl and activated heteroarylbromides proceeds readily under ligandless conditions. When deactivated aryl- and heteroaryltrifluoroborates are coupled with aryl and heteroarylbromides and chlorides, a low loading (0.5-2%) of PdCl(2)(dppf).CH(2)Cl(2) efficiently
Total synthesis and dual PPARα/γ agonist effects of Amorphastilbol and its synthetic derivatives
作者:Taejung Kim、Woojung Lee、Kyu Hyuk Jeong、Jung Ho Song、Soon-Hye Park、Pilju Choi、Su-Nam Kim、Seokjoon Lee、Jungyeob Ham
DOI:10.1016/j.bmcl.2012.04.062
日期:2012.6
extract, is a biologically interesting natural trans-stilbene compound with dual peroxisome proliferator-activated receptor (PPAR) α/γ agonist activity. After total synthesis of APH-1 and its derivatives by Pd-catalyzed Suzuki–Miyaura cross-coupling of a common (E)-styryl bromide intermediate and various aromatic trifluoroborate compounds, we biologicallyevaluated APH-2–APH-12 for PPAR agonist activity