A Synthesis of “Dual Warhead” β-Aryl Ethenesulfonyl Fluorides and One-Pot Reaction to β-Sultams
作者:Praveen K. Chinthakindi、Kimberleigh B. Govender、A. Sanjeeva Kumar、Hendrik G. Kruger、Thavendran Govender、Tricia Naicker、Per I. Arvidsson
DOI:10.1021/acs.orglett.6b03634
日期:2017.2.3
boron-Heck coupling that is compatible with the ethenesulfonyl fluoride functional group. The protocol proceeds at room temperature with chemoselectivity and E-isomer selectivity and offers facile access to a wide range of β-aryl/heteroaryl ethenesulfonyl fluorides from commercial boronic acids. Furthermore, we demonstrate a “one-pot click” reaction to directly transform the products to aryl-substituted β-sultams
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
Gram-Scale Synthesis of β-(Hetero)arylethenesulfonyl Fluorides <i>via</i>
a Pd(OAc)<sub>2</sub>
Catalyzed Oxidative Heck Process with DDQ or AgNO<sub>3</sub>
as an Oxidant
作者:Gao-Feng Zha、Grant A. L. Bare、Jing Leng、Zhen-Peng Shang、Zhixiong Luo、Hua-Li Qin
DOI:10.1002/adsc.201700688
日期:2017.9.18
gram‐scale operation without the requirement for strict anhydrous or oxygen‐free conditions. Furthermore, this procedure discriminates against the formation of arylboronic acids homo‐coupling byproducts. In addition, the preparation of the first aryl vinylsulfonate polymer, a material with functionalizable Michael acceptor sites, from a starting arylboronic acid is described.
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
Radical hydro-fluorosulfonylation of olefins has been successfully achieved by employing FABI as a FSO2-radical precursor and ODA as an organic photocatalyst. With this photocatalytic system, radical hydro-fluorosulfonylation of alkynes can also be realized with a unique, high Z-selectivity. Utilization of this method is further demonstrated in the late-stage modification of natural products and drug