We report herein a direct method to synthesize 4-aryl-3-butenoic acid through a carboxylic-acid-directed oxidative Heck reaction. The various 4-aryl-3-butenoic acids are easily prepared in moderate to good yields. In view of the promising bioactivity of 4-phenyl-3-butenoic acid previously reported, its derivatives reported here may be bioactive.
Directed Copper-Catalyzed Intermolecular Heck-Type Reaction of Unactivated Olefins and Alkyl Halides
作者:Chunlin Tang、Ran Zhang、Bo Zhu、Junkai Fu、Yi Deng、Li Tian、Wei Guan、Xihe Bi
DOI:10.1021/jacs.8b10874
日期:2018.12.12
A new type of intermolecular alkylative olefination of unactivated olefins and alkyl halides has been realized for the first time. This copper-promoted Heck-type reaction employs a directing-group strategy to efficiently produce the coupled alkyl olefin products with excellent regio- and stereoselectivity. A broad substrate scope including 1°, 2°, and 3° alkyl bromides and various nonactivated alkenes
Nickel‐Catalyzed Kinetic Resolution of Racemic Unactivated Alkenes via Enantio‐, Diastereo‐, and Regioselective Hydroamination
作者:Hyung‐Joon Kang、Changseok Lee、Sungwoo Hong
DOI:10.1002/anie.202305042
日期:2023.6.12
An efficient enantioselective catalysis using a chiral nickel complex has been developed via kinetic resolution of racemic α-substituted unconjugated carbonyl alkenes. This hydroamination protocol produces a wide range of syn-β2,3-amino acid derivatives derivatives and α-alkylated unconjugated carbonyl olefins with high enantiomeric purity.
Copper-Catalyzed Bifunctionalization/Annulation of Unactivated Alkene with Alkyl Bromides
作者:Cancan Feng、Yangjie Wu
DOI:10.1021/acs.joc.3c01746
日期:2023.11.3
from unactivated alkenes and alkylbromides via a Cu-catalyzed inter-/intramolecular carboamidation. This reaction proceeded smoothly under mild reaction conditions and exhibited a broad substrate scope and various functional groups. This protocol is not only compatible with 1, 2, and 3° alkylbromides but also suitable for α-bromo nitrile as well as various benzyl bromides. The mechanism exploration
β-内酰胺是生物活性化合物和药物中普遍存在的支架。在此,我们公开了一种从未活化的烯烃和烷基溴出发,通过 Cu 催化的分子间/分子内碳酰胺化反应构建 β-内酰胺的简化方法。该反应在温和的反应条件下顺利进行,并表现出广泛的底物范围和丰富的官能团。该方案不仅与 1、2 和 3° 烷基溴兼容,而且还适用于 α-溴腈以及各种苄基溴。机理探索表明涉及顺序自由基加成/还原消除。
Visible-Light-Induced Difunctionalization of 3-Butenoic Acid with Bromodifluoromethyl Heteroarylsulfones
a visible-light-induced iridium-promoted direct bifunctionalization of 3-butenoicacid with bromodifluoromethyl heteroarylsulfones. This methodology enables the concurrent introduction of difluoromethyl heteroarylsulfone and bromine groups into 3-butenoicacid under mild reaction conditions. Various α-substituted 3-butenoicacids and bromodifluoromethyl heteroarylsulfones were found to be compatible