A simple and convenient copper-catalyzed hydroamination of arylacetylenes with secondary amines has been performed giving a simple access to aliphatic amines after reduction of the hydroaminated products (E-enamines).
Electrochemical Oxidative [4+2] Annulation for the π‐Extension of Unfunctionalized Heterobiaryl Compounds
作者:Xia Hu、Lei Nie、Guoting Zhang、Aiwen Lei
DOI:10.1002/anie.202003656
日期:2020.8.24
biological activities, regioselective access to fused aromatic compounds is significantly important in the field of organic materials and pharmaceutical science. Herein, we developed electrochemical oxidative [4+2] annulationreactions of heterobiaryl compounds with alkynes or alkenes, leading to the formation of several polycyclic heteroaromatic compounds. This electrosynthetic methodology serves for
Sulfonylfluorides have widespread applications in many important fields, including ligation chemistry, chemical biology, and drug discovery. Therefore, new methods to increase the synthetic efficiency and expand the available structures of sulfonylfluorides are highly in demand. Here, we introduce a new and powerful class of sulfonylfluoride hubs, β-chloro alkenylsulfonyl fluorides (BCASF), which
Generation of Axially Chiral Fluoroallenes through a Copper-Catalyzed Enantioselective β-Fluoride Elimination
作者:Thomas J. O’Connor、Binh Khanh Mai、Jordan Nafie、Peng Liu、F. Dean Toste
DOI:10.1021/jacs.1c05769
日期:2021.9.1
difluorides to generate axiallychiral, tetrasubstituted monofluoroallenes in both good yields (27 examples >80%) and enantioselectivities (82–98% ee). Compared to previously reported synthetic routes to axiallychiralallenes (ACAs) from prochiral substrates, a mechanistically distinct reaction has been developed: the enantiodiscrimination between enantiotopic fluorides to set an axial stereocenter. DFT
Synthesis and Biological Activity of Various Derivatives of a Novel Class of Potent, Selective, and Orally Active Prostaglandin D<sub>2</sub> Receptor Antagonists. 1. Bicyclo[2.2.1]heptane Derivatives
Novel prostaglandin D(2) (PGD(2)) receptor antagonists were synthesized as a potential new class of antiallergic agents having a bicyclo[2.2.1]heptane ring system with sulfonamide groups. Some of them exhibit extremely potent antagonism of the PGD(2) receptor in radioligand binding and cAMP formation assays with IC(50) values below 50 nM and much less antagonism of TXA(2) and PGI(2) receptors. These