organosulfur compounds, limited examples of transition-metal-catalyzed thiol-ene reactions have been reported. However, in this work, a directing-group-assisted hydrothiolation of styrenes with thiols by photoredox/cobalt catalysis is found to proceed smoothly to afford Markovnikov-type sulfides with excellent regioselectivity.
Pd(II)-Catalyzed Enantioselective Intramolecular Arylation of Unbiased C(sp<sup>3</sup>)–H Bonds to Construct Chiral Benzo-ring Compounds
作者:Ye-Qiang Han、Qi Zhang、Xu Yang、Meng-Xue Jiang、Yi Ding、Bing-Feng Shi
DOI:10.1021/acs.orglett.0c03775
日期:2021.1.1
The asymmetric synthesis of chiral benzo-ring containing compounds through enantioselectiveintramoleculararylation of unbiased methylene C(sp3)–H bonds was reported. Judicious choice of non-C2-symmetric chiral phosphoric acid (CPA) ligand is crucial for the high reactivity and enantioselectivity. The slight decrease in enantioselectivity at the late stage of the reaction was attributed to the hydrolysis
Palladium-Catalyzed Synthesis of Selectively Substituted Phenanthridine Derivatives
作者:Nicola Della Ca'、Elena Motti、Marta Catellani
DOI:10.1002/adsc.200800512
日期:2008.11.3
Selectivelysubstituted phenanthridine derivatives are obtained by a facile reaction of o-alkylated aryl iodides, o-bromoarenesulfonylanilines and activated olefins in the presence of palladium and norbornene as catalysts. The reaction takes place under mild conditions to give the products in satisfactory yields using readily available starting materials.
Palladium‐Catalyzed Regioselective Synthesis of 1‐Hydroxycarbazoles Under Aerobic Conditions
作者:So Won Youn、Young Ho Kim、Yoon Hyung Jo
DOI:10.1002/adsc.201801265
日期:2019.2
A palladium‐catalyzed aerobic C−H amidation of N‐Ts‐2‐amino‐3′‐hydroxylbiaryls has been developed to afford a diverse range of 1‐hydroxycarbazoles with high regioselectivity and efficiency. This protocol benefits from operational simplicity, robustness, and sustainability with the use of ambient air as the sole terminal oxidant. Further elaboration of the products obtained from this process provides
Enantioselective Desymmetrization of Cyclobutanones Enabled by Synergistic Palladium/Enamine Catalysis
作者:Meng Wang、Jun Chen、Zongjia Chen、Changxu Zhong、Ping Lu
DOI:10.1002/anie.201711845
日期:2018.3.1
The enantioselective intramolecular α‐arylation of cyclobutanones has been established by combining palladium and enamine catalyst systems. Two different enantioselective control strategies have been developed for cyclobutanone substrates bearing O‐ or N‐tethered aryl bromides. Further synthetic applications are also reported.