extensive studies on FSO2+‐type reagents, a radicalfluorosulfonylation reaction with a fluorosulfonyl radical (FSO2.) remains elusive so far, probably owing to its instability and difficulty in generation. Herein, the development of the first radicalfluorosulfonylation of alkenes based on FSO2 radicals generated under photoredox conditions is reported. This radical approach provides a new and general access
Converting (<i>E</i>)-(Hetero)arylethanesulfonyl Fluorides to (<i>Z</i>)-(Hetero)arylethanesulfonyl Fluorides Under Light Irradiation
作者:Yu-Mei Huang、Shi-Meng Wang、Jing Leng、Balakrishna Moku、Chuang Zhao、Njud S. Alharbi、Hua-Li Qin
DOI:10.1002/ejoc.201900799
日期:2019.7.31
construction of (Z)‐(hetero)aryl ethenesulfonyl fluorides was achieved utilizing Iridium photoredox catalysis under UV‐lightirradiation. This protocol provided a diverse range of (Z)‐(hetero) arylethenesulfonyl fluorides in moderate to good yields under mild conditions without external additives. The late‐stage transformation of the (Z)‐(hetero)arylethenesulfonyl fluorides comparing with their E‐configuration
Palladacycle promoted asymmetric hydrophosphination of α,β-unsaturated sulfonyl fluorides
作者:Xi-Rui Li、Houguang Jeremy Chen、Weifan Wang、Mengtao Ma、Yu Chen、Yongxin Li、Sumod A. Pullarkat、Pak-Hing Leung
DOI:10.1016/j.jorganchem.2019.120912
日期:2019.10
The first example of an enantioselective hydrophosphination reaction of ethenesulfonyl fluoride derivatives catalyzed by a phosphapalladacycle afforded chiral sulfonyl fluoride-derived phosphines in quantitative yields and enantioselectivities of up to 93% ee. Investigations revealed the importance of adjacent vacant sites within the active metal center for intramolecular nucleophilic attack to provide
N‐Heterocyclic Carbene Catalyzed Synthesis of δ‐Sultones via α,β‐Unsaturated Sulfonyl Azolium Intermediates
作者:Andrei Ungureanu、Alison Levens、Lisa Candish、David W. Lupton
DOI:10.1002/anie.201504633
日期:2015.9.28
A limited array of reactive intermediates have enabled a wealth of discoveries in N‐heterocycliccarbene organocatalysis. In this study, the viability of α,β‐unsaturatedsulfonylazoliums as double electrophiles in new reactions is examined. Specifically, the (3+3) annulation of such species with the trimethylsilyl enol ethers of various 1,3‐dicarbonyl compounds has been developed. This reaction provides
Synthesis of a Class of Fused δ-Sultone Heterocycles<i>via</i>DBU-Catalyzed Direct Annulative SuFEx Click of Ethenesulfonyl Fluorides and Pyrazolones or 1,3-Dicarbonyl Compounds
作者:Xing Chen、Gao-Feng Zha、Grant A. L. Bare、Jing Leng、Shi-Meng Wang、Hua-Li Qin
DOI:10.1002/adsc.201700887
日期:2017.9.18
(E)‐2‐(hetero)arylethenesulfonyl fluorides and (E,E)‐1,3‐dienylsulfonyl fluorides are bis‐electrophiles and rare members of the sulfonyl fluoride family with limited information being known of their reactivity and synthetic utility. The direct annulation reaction of these 2‐substituted ethenesulfonyl fluorides with medicinally important enolizable pyrazolones and 1,3‐dicarbonyl compounds utilizing catalytic DBU