Palladium-Catalyzed C−H Functionalization of Phenyl 2-Pyridylsulfonates
作者:Bin Li、Dong-Dong Guo、Shi-Huan Guo、Gao-Fei Pan、Ya-Ru Gao、Yong-Qiang Wang
DOI:10.1002/asia.201601413
日期:2017.1.3
An efficient palladium(II)‐catalyzed intermolecular direct ortho‐alkenylation and acetoxylation of phenols has been developed. The reaction proceeded via a seven‐membered cyclopalladated intermediate and showed complete regio‐ and diastereoselectivity. The approach also provided an efficient route for the synthesis of coumarins and benzofurans.
Pharmaceutical Composition for Preventing and Treating Metabolic Bone Diseases Containing Alpha-Arylmethoxyacrylate Derivatives
申请人:Kim Bum Tae
公开号:US20080280901A1
公开(公告)日:2008-11-13
The present invention relates to a use of a specific alpha-arylmethoxyacrylate derivative, or its pharmacologically acceptable salt or solvate for preventing and treating metabolic bone diseases.
10A-AZALIDE COMPOUND CROSSLINKED AT 10A- AND 12-POSITIONS
申请人:Sugimoto Tomohiro
公开号:US20110237784A1
公开(公告)日:2011-09-29
A novel 10a-azalide compound crosslinked at the 10a- and 12-positions, which is represented by the following formula, and is effective on even
Hemophilus influenzae
, or erythromycin resistant bacteria (e.g., resistant pneumococci and streptococci).
Pharmaceutical Composition For Preventing and Treating Metabolic Bone Diseases Containing Alpha-Arylmethoxyactylate Derivatives
申请人:KIM Bum Tae
公开号:US20100256367A1
公开(公告)日:2010-10-07
The present invention relates to a use of a specific alpha-arylmethoxyacrylate derivative, or its pharmacologically acceptable salt or solvate for preventing and treating metabolic bone diseases.
Despite the recent development of borylradical reactions, current methods to generate them by relying on photocatalysts or radical initiators cause contamination of the reaction. Herein, a novel system for generating borylradicals has been developed without using photocatalysts or external radical initiators, and only a catalytic amount of thiol has been used. The success of this approach depends
尽管硼基自由基反应最近得到发展,但目前依靠光催化剂或自由基引发剂产生它们的方法会导致反应受到污染。在此,已经开发了一种用于产生硼基自由基的新系统,而无需使用光催化剂或外部自由基引发剂,并且仅使用了催化量的硫醇。这种方法的成功取决于硫醇作为质子供体和氢原子转移 (HAT) 催化剂的双重作用。硫醇首先与 NHC-硼烷反应,通过脱氢偶联反应生成硼基硫化物,然后它们就地发生通过光化学反应裂解它们的 B-S 键。获得的自由基随后参与快速硫醇催化的 HAT 反应,得到硼氢化产物。该策略使区域选择性硼氢化能够以良好至优异的产率从多种α,β-不饱和烯烃和苯乙烯大规模合成α-或β-硼化产物,在室温下具有广泛的官能团相容性。该反应还可以扩展到亚胺的自由基型亲核加成。这种前所未有的协议有望通过光化学反应使用硫化硼,在其他涉及硼自由基的反应中找到潜在的应用。