Enantioselective Sensing of Amines Based on [1 + 1]-, [2 + 2]-, and [1 + 2]-Condensation with Fluxional Arylacetylene-Derived Dialdehydes
摘要:
Four induced circular dichroism (ICD) probes exhibiting a stereodynamic arylacetylene framework and terminal aldehyde units have been prepared. The CD silent sensors generate a strong chlroptical response to substrate-controlled induction of axial chirality upon selective [1 + 1]-, [2 + 2]-, and [1 + 2]-condensation. The Intense Cotton effects can be exploited for In situ ICD analysis of the absolute configuration and ee of a wide range of amines.
Gold‐Catalyzed One‐Pot A
<sup>3</sup>
‐Coupling/1,5‐Hydride Shift/Schmittel‐Type Cyclization: From Aldehydes, Amines and Alkynes to the Synthesis of Benzo[
<i>b</i>
]fluorenes
作者:Danilo M. Lustosa、Deborah Hartmann、Matthias Rudolph、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1002/ejoc.201901906
日期:2020.3.8
A short cut to anellated systems by goldcatalysis is based on a combination of a gold‐catalyzed A3‐coupling followed by a 1,5‐hydride shift and a Schmittel‐type cyclization in a single synthetic operation.
Systematic Investigation of Silver-Carbon Bonding in Coordination Frameworks with Aryl Ligands That Contain Ethynyl and Ethenyl Substituents
作者:Sam C. K. Hau、Thomas C. W. Mak
DOI:10.1002/chem.201204225
日期:2013.4.22
e complexes that contained designed ligands, each of which was composed of an aromatic system that was functionalized with terminal and internal ethynyl groups and a vinyl substituent, provided detailed information on the influence of ligand disposition and orientation, coordination preferences, and the co‐existence of different types of silver(I)–carbon bonding interactions (silver–ethynide, silver–ethynyl
A CuBr-mediated aerobic reaction of 2-alkynylbenzaldehydes and primary amines: synthesis of 4-bromoisoquinolones
作者:Pei Chui Too、Shunsuke Chiba
DOI:10.1039/c2cc33426g
日期:——
A method for synthesis of 4-bromoisoquinolones has been developed starting from 2-alkynylbenzaldehydes and primary amines mediated by CuBr under an O2 atmosphere, where CuBr plays multiple roles to facilitate the present reactions.
Organocatalytic Enantio- and Diastereoselective Synthesis of 1,2-Dihydronaphthalenes from Isobenzopyrylium Ions
作者:Hui Qian、Wanxiang Zhao、Zhaobin Wang、Jianwei Sun
DOI:10.1021/ja509824j
日期:2015.1.21
efficient asymmetricsynthesis of dihydronaphthalenes is disclosed. The process represents a new addition to the limited asymmetricreactions of isobenzopyryliums, a family of versatile 10π-electron aromatic species. Excellent asymmetric induction is achieved for the first time without an anchoring group in the 4-position or a metal catalyst, both of which were required previously in these reactions. The
Phosphoramidates as Transient Precursors of Nitrogen‐Centered Radical Under Visible‐Light Irradiation: Application to the Synthesis of Phthalazine Derivatives
作者:Maxime De Abreu、Mohamed Selkti、Philippe Belmont、Etienne Brachet
DOI:10.1002/adsc.202000018
日期:2020.5.26
N‐Centered Radical (NCR) precursors under visible‐light irradiation. More precisely among this class of phosphorus‐derived compounds, we studied the radical reactivity of phosphonohydrazones, under mild reaction conditions, which allowed the synthesis of a wide and diversified library of the scarcely reported phthalazine scaffold. Mechanistic investigations confirmed the formation of a NCR from these brand‐new