AuCl<sub>3</sub>-Catalyzed Synthesis of Highly Substituted Furans from 2-(1-Alkynyl)-2-alken-1-ones
作者:Tuanli Yao、Xiaoxia Zhang、Richard C. Larock
DOI:10.1021/ja0466964
日期:2004.9.1
Highly substituted furans have been synthesized by the reaction of 2-(1-alkynyl)-2-alken-1-ones and various nucleophiles under very mild reaction conditions in good to excellent yields. Gold and some other transition metals are efficient catalysts for this reaction.
Paracyclophane-based Silver Phosphates as Catalysts for Enantioselective Cycloisomerization/Addition Reactions: Synthesis of Bicyclic Furans
作者:Guillaume Force、Yvette Lock Toy Ki、Kévin Isaac、Pascal Retailleau、Angela Marinetti、Jean-François Betzer
DOI:10.1002/adsc.201800587
日期:2018.9.3
C2‐symmetric paracyclophane scaffolds as chiral counterions in transition metal catalysis, showing that they may compare favorably with other known chiral phosphates, such as the TRIP phosphate. The targeted catalyticreaction is a silver(I) promoted domino heterocyclization of 2‐(1‐alkynyl)‐2‐alken‐1‐one derivatives, in the presence of C‐, or N‐nucleophiles, which provides an efficient access to substituted bicyclic
Modulable monosulfonyl squaramides have been shown to exert activation of gold(I) chloride complexes through H-bonding in an intermolecular way. Combinations of (PPh3)AuCl or IPrAuCl complexes and an optimal sulfonyl squaramide cocatalyst bearing two 3,5-bis(trifluoromethyl)phenyl groups efficiently catalyzed diverse heterocyclizations and a cyclopropanation reaction, avoiding in all cases undesired