Palladium/Xu-Phos Catalyzed Enantioselective Tandem Heck/Cacchi Reaction of Unactivated Alkenes

来源 :中国化学(英文版) | 被引量 : 0次 | 上传用户:dzflying
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
A highly enantioselective palladium-catalyzed intermolecular tandem Heck/Cacchi reaction of unactivated alkenes with ortho-ethynyl-anilines was developed,which provides a powerful route to access a broad range of enantioenriched 2,3-dihydrobenzofuran-or indo-line-substituted indoles bearing all-carbon quaternary stereocenter of interest in pharmaceutical research.Its salient features include inherent atom-and step-economy,high functional group tolerance,mild conditions,broad structural diversity together with excellent enantioselectivities.
其他文献
The first asymmetric decarboxylative[3+2]-cycloaddition of ethynyl indoloxazolidones with carboxylic acids has been developed un-der synergistic catalysis of copper and chiral Lewis base.This protocol provides a direct and modular approach to biologically
Kosinostatin (KST) contains an uncommon aminopyrrole moiety,whose biosynthesis has remained elusive.Herein,aminopyrrolinic acid,which was generated by an L-ectoine synthase-like enzyme KstB3 via cyclization of L-glutamine,was identified to be the real sub
A new cyclic thiopeptide,berninamycin F (3),three new linear thiopeptides,berninamycins G—I (4-6),and two known berninamycin derivatives,berninamycins C and D (1 and 2) were isolated from Streptomyces sp.CPCC 203702.Their structures were elucidated throug
Polyethylene glycol (PEG) as phase change material (PCM) and carboxyl-rich carbon (RHTC) with different carboxyl content was intro-duced to prepare RHTC/PEG composites.The composites have high thermal conductivity,photothermal conversion ability,and im-pr
We report herein the precision synthesis and phase behaviors of multi-tailed B2AB2-type regio-isomeric giant surfactants consisting of a hydrophilic polyhedral oligomeric silsesquioxane (POSS) head tethered with four hydrophobic polystyrene (PS) tails.The
Herein,we report an efficient,tunable system for electrochemical reduction of ketones and phthalimides at room temperature with-out the need for stoichiometric external reductants.By utilizing NaN3 as the electrolyte and graphite felt as both the cathode
A green and efficient photolabile protecting group (PPG)-mediated glycosidation approach for the synthesis of 2-deoxy-glycosides is reported.By employing ortho-nitrobenzyl carbonate (oNBC) as PPG,N,N-dimethylformamide (DMF)-modulated SPhosAuNTf2-pro-moted
Imine-linked covalent organic frameworks (COFs) have attracted extensive attention due to designable structures,tunable properties,and excellent thermal and chemical stability.They were typically obtained as insoluble and unprocessable powders,which serio
A phytochemical investigation on the seeds of Sophora alopecuroides led to obtaining fourteen structurally diverse matrine-based al-kaloids (1-14),including eight new ones (1,6,8-12,14).Notably,alopecuroide F (1) represents the first dimeric matrine-type
Chromatographic purification of Sigesbeckia glabrescens extracts led to three undescribed ent-pimarane diterpenoid dimers,named glabreside A—C (1-3).Their structures were confirmed by comprehensive spectroscopic analyses,and the structures of compound 1 a