Palladium-Catalyzed Fluorosulfonylvinylation of Organic Iodides
作者:Gao-Feng Zha、Qinheng Zheng、Jing Leng、Peng Wu、Hua-Li Qin、K. Barry Sharpless
DOI:10.1002/anie.201701162
日期:2017.4.18
A palladium‐catalyzed fluorosulfonylvinylation reaction of organiciodides is described. Catalytic Pd(OAc)2 with a stoichiometric amount of silver(I) trifluoroacetate enables the coupling process between either an (hetero)aryl or alkenyl iodide with ethenesulfonyl fluoride (ESF). The method is demonstrated in the successful syntheses of eighty‐eight otherwise difficult to access compounds, in up to
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
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
Regio- and Stereoselective Installation of Bromide onto Vinyl Sulfonyl Fluorides: Construction of a Class of Versatile Sulfur Fluoride Exchange Hubs
作者:Xu Zhang、Wan-Yin Fang、Hua-Li Qin
DOI:10.1021/acs.orglett.2c01509
日期:2022.6.10
A convenient protocol for the exclusively regio- and stereoselective installation of a bromine atom on the 2-arylvinylsulfonyl fluorides using lithium bromide (LiBr) as the bromine source was described, providing (Z)-1-bromo-2-arylethene-1-sulfonyl fluorides (Z-BASF) with versatile reactive handles (bromide, vinyl, and sulfonyl fluoride) in ≤88% yield. Meanwhile, Z-BASF molecules displayed various
描述了使用溴化锂 (LiBr) 作为溴源在 2-芳基乙烯基磺酰氟上专门区域和立体选择性安装溴原子的便捷方案,提供 ( Z )-1-bromo-2-arylethene-1-sulfonyl氟化物 ( Z -BASF) 具有多种反应性处理物(溴化物、乙烯基和磺酰氟),收率≤88%。同时,Z -BASF分子在一系列化学转化中表现出不同的反应性。
Olefination with Sulfonyl Halides and Esters: Synthesis of Unsaturated Sulfonyl Fluorides
addition of the carbanion, followed by cyclization–fragmentation of the four-membered ring intermediate. In the absence of base, electron-rich aldehydes follow an alternative pathway of the Knoevenagel condensation to provide unsaturated 1,1-disulfonyl fluorides. We demonstrate also trapping of elusive ethene-1,1-disulfonyl fluoride, CH2═C(SO2F)2, with 4-(dimethylamino)pyridine (DMAP) that forms zwitterionic