Gold(I)‐Catalyzed Highly Diastereo‐ and Enantioselective Cyclization–[4+3] Annulation Cascades between 2‐(1‐Alkynyl)‐2‐alken‐1‐ones and Anthranils
作者:Rahul Dadabhau Kardile、Tzu‐Hsuan Chao、Mu‐Jeng Cheng、Rai‐Shung Liu
DOI:10.1002/anie.202001854
日期:2020.6.22
This work reports gold‐catalyzed [4+3]‐annulations of 2‐(1‐alkynyl)‐2‐alken‐1‐ones with anthranils to yield epoxybenzoazepine products with excellent exo ‐diastereoselectivity (dr>25:1). The utility of this new gold catalysis is manifested by applicable substrates over a broad scope. More importantly, the enantioselective versions of these [4+3]‐cycloadditions have been developed satisfactorily with
Tetrasubstituted furans by PdII/CuI-cocatalyzed three-component domino reactions of 2-(1-alkynyl)-2-alken-1-ones, nucleophiles and diaryliodonium salts
作者:Wenbo Li、Junliang Zhang
DOI:10.1039/c0cc03450a
日期:——
A novel Pd(OAc)(2)/CuI-cocatalyzed three-componentreaction of 2-(1-alkynyl)-2-alken-1-ones, nucleophiles and diaryliodonium salts has been developed. The procedure allows the synthesis of tetrasubstitutedfurans in good to high yields under mild conditions.
Gold-Catalyzed Cascade Cyclization and 1,3-Difunctionalization To Access Polysubstituted Furans
作者:Yong Xu、Jiangtao Sun
DOI:10.1021/acs.orglett.0c04090
日期:2021.2.5
Gold-catalyzedcascadecyclization and 1,3-difunctionalization of 2-(1-alkyny)-2-alken-1-ones with N,O-acetals are described, leading to the discovery of novel 1,3-oxyaminomethylation and 1,3-aminomethylamination. Typically, by varying the reaction conditions especially the gold catalysts, these two distinct reaction pathways can be controlled in a selective manner. Moreover, tandem cyclization and
Regioselective Addition of Organometallic Reagents to 2-(1-Alkynyl)-2-alken-1-ones for an Efficient Synthesis of Substituted 1,2-Allenyl Ketones
作者:Xiuzhao Yu、Junliang Zhang
DOI:10.1002/adsc.201100009
日期:2011.5
Highly substituted 1,2‐allenyl ketones can be easily and efficiently prepared fromorganometallicreagents and readily available 2‐(1‐alkynyl)‐2‐alken‐1‐ones. The synthetic application of 1,2‐allenyl ketone products was also showcased by palladium‐catalyzed further transformation.
Gold(I)-Catalyzed, Highly Diastereoselective, Tandem Heterocyclizations/[3+2] Cycloadditions: Synthesis of Highly Substituted Cyclopenta[c]furans
作者:Hongyin Gao、Xingxing Wu、Junliang Zhang
DOI:10.1002/chem.201003363
日期:2011.3.1
The domino effect: A novel, cationic, gold(I)‐catalyzed [3+2], tandem bicyclization, which provides rapid, efficient, and diastereoselective access to highly substituted cyclopenta[c]furans from simple, readily available 2‐(1‐alkynyl)‐2‐alken‐1‐ones and 3‐styrylindoles under mild conditions, is described (see scheme).