report the development of Pd(II)-catalyzed C(sp3)–H arylation of Weinrebamides. Both the inductive effect and the potential bidentate coordination mode of the Weinrebamides pose a unique challenge for this reaction development. A pyridinesulfonic acid ligand is designed to accommodate the weak, neutral-coordinating property of Weinrebamides by preserving the cationic character of Pd center through zwitterionic
Acid-Enabled Palladium-Catalyzed β-C(sp<sup>3</sup>)–H Functionalization of Weinreb Amides
作者:Liming Yang、Henan Xie、Guanghui An、Guangming Li
DOI:10.1021/acs.joc.1c00781
日期:2021.6.4
with weakly coordinating groups normally requires a transient directing group or presynthesized nitrogen-based strong coordinating ligands. Herein, we report Pd(II)-catalyzed C(sp3)–H arylation and alkenylation of Weinreb amides. A commercially available, inexpensive sulfonic acid was employed to enhance the coordination of the catalyst with weak-coordinating substrates by increasing the electrophilicity
Pyrrolidine derivatives as prostaglandin modulators
申请人:Liao Yihua
公开号:US20050176800A1
公开(公告)日:2005-08-11
Substituted pyrrolidine compounds are provided, and methods of treatment and pharmaceutical composition that utilize or comprise one or more such compounds. Compounds of the invention are useful for a variety of therapies, including treating or preventing preterm labor, dysmenorrhea, asthma, hypertension, infertility or fertility disorder, undesired blood clotting, preeclampsia or eclampsia, an eosinophil disorder, sexual dysfunction, osteporosis and other destructive bone disease or disorder, and other diseases and disorders associated with the prostaglandin family of compounds. In a preferred aspect, a substituted pyrrolidine compound is administered to a subject in coordination with a phosphodiesterase inhibitor compound.
Rh(II)-Catalyzed Ring Expansion of Cyclopropyl N-Tosylhydrazones to 1-Substituted Cyclobutenes
作者:Jingfeng Huo、Jianbo Wang、Wenbai Ouyang
DOI:10.1055/a-1995-5960
日期:——
useful synthetic intermediates as well as important motifs in functional molecules. Herein, we report a straightforward access toward monosubstituted cyclobutenes from cyclopropyl N-tosylhydrazone. 1,2-Aryl or -alkyl shift of the Rh(II) carbene intermediate plays the key role in this transformation.
Site‐selective Hydrogenation/Deuteration of Benzylic Olefins Enabled by Electroreduction Using Water
作者:Simon Kolb、Daniel B. Werz
DOI:10.1002/chem.202300849
日期:——
Electroreduction of benzylicolefins has been applied to site-selectively hydrogenate such double bonds while other functions that react under regular hydrogenation conditions are present. By the use of water as proton source this protocol also allows deuteration by simply switching to D2O. The applicability of this method was shown by the use of a commercially available electrolysis setup and a broad
苄基烯烃的电还原已应用于位点选择性氢化此类双键,同时存在在常规氢化条件下反应的其他功能。通过使用水作为质子源,该协议还允许通过简单地切换到 D 2 O 进行氘化。该方法的适用性通过使用商用电解装置和广泛的底物范围得到证明。