1-Bromoethene-1-sulfonyl fluoride (1-Br-ESF), a new SuFEx clickable reagent, and its application for regioselective construction of 5-sulfonylfluoro isoxazoles
作者:Jing Leng、Hua-Li Qin
DOI:10.1039/c8cc00986d
日期:——
A new fluorosulfonylation reagent 1-bromoethene-1-sulfonyl fluoride was developed (1-Br-ESF). This unique reagent possesses three addressable handles (vinyl, bromide, and sulfonyl fluoride) and has great potential to function as a tris-electrophile and as a sulfur(VI) fluoride exchange (SuFEx) clickable material to enrich the SuFEx tool cabinet. The application of this reagent for regioselective synthesis
On-Water Selectivity Switch in Microdroplets in the 1,2,3-Triazole Synthesis from Bromoethenesulfonyl Fluoride
作者:Dmitry B. Eremin、Valery V. Fokin
DOI:10.1021/jacs.1c08879
日期:2021.11.10
describe the on-water switch of chemoselectivity in the formation of triazoles controlled by the on-water environment in dual spray. These conditions facilitate elimination of H–SO2F from the triazoline intermediate, whereas the reaction in organicsolvents results in the exclusive HBr elimination. The influence of two-phase conditions was investigated to obtain the best reaction efficiency, and the
水通过加速或改变它们的选择性对许多有机反应产生深远的影响。在“水上”进行反应提供了一个影响化学反应性的有趣机会。雾化器羽流是产生微滴的有效方式——独特的复杂反应环境,开启了在散装乳液中不易获得的替代可能性。我们描述了在双喷雾中由水上环境控制的三唑形成过程中化学选择性的水上开关。这些条件有助于消除 H–SO 2F来自三唑啉中间体,而在有机溶剂中的反应导致唯一的 HBr 消除。研究了两相条件的影响以获得最佳反应效率,并通过 pH 值变化和 D 2 O 使用验证了水/有机界面相互作用的关键重要性。
SuFExable <i>NH</i>-Pyrazoles via 1,3-Dipolar Cycloadditions of Diazo Compounds with Bromoethenylsulfonyl Fluoride
作者:Pavel Yamanushkin、Kemal Kaya、Mark Aldren M. Feliciano、Brian Gold
DOI:10.1021/acs.joc.1c03105
日期:2022.3.4
“Click” reactions have transformed the molecular sciences. Augmenting cycloadditionreactions, sulfur(VI) fluoride exchange (SuFEx) chemistry has diversified the landscape of molecular assembly. Herein, we report a facile strategy to access SuFExable NH-pyrazoles via strain and catalyst-free 1,3-dipolar cycloadditions of stabilized diazo compounds under mild conditions. Subsequent SuFEx proceeds efficiently
Light-induced [2 + 2] cycloadditions for the construction of cyclobutane-fused pyridinyl sulfonyl fluorides
作者:Jing Liu、Shi-Meng Wang、Hua-Li Qin
DOI:10.1039/d0ob00814a
日期:——
biologically significant molecules. A photocatalytic [2 + 2] cycloaddition between pyridones or isoquinolones and ethenesulfonyl fluoride was achieved, providing a portal to a class of unique cyclobutane-fused pyridinyl sulfonyl fluorides with quaternary rigid rings (30 examples). Further applications of these novel sulfonyl fluoride molecules in SuFEx click chemistry were also accomplished, providing