Sulfated tungstate/dioxygen: a new catalytic system for oxysulfonylation of styrenes to form β-keto sulfones
作者:Ganesh D. Wagh、Snehalata B. Autade、Raghavendra V. Kulkarni、Krishnacharya G. Akamanchi
DOI:10.1039/d0nj01763a
日期:——
A new system for synthesis of a wide range of β-ketosulfones using sulfated tungstate as a heterogeneous catalyst and oxygen as an environmentally benign oxidant with aryl hydrazides and styrenes as reacting counterparts has been developed. The preliminary experimental results support the involvement of free radical species. Thus, aryl sulfonyl free radicals, generated by oxidation of aryl sulfonyl
Metal-free tetra-n-butylammonium bromide-mediated aerobic oxidative synthesis of β-ketosulfones from styrenes
作者:Xin Wan、Kai Sun、Guisheng Zhang
DOI:10.1007/s11426-016-0284-2
日期:2017.3
An efficient and broadly applicable protocol for the aerobic coupling of styrenes with sulfonylhydrazides has been developed that affords β-ketosulfones bearing various functional groups in moderate to excellent yields. The preliminary experimental results support the involvement of active benzyl radical species, and a radical pathway was therefore proposed for the reaction.
K2S2O8-mediated decarboxylative oxysulfonylation of cinnamic acids: A transition-metal-free synthesis of β-keto sulfones
作者:Ruchi Chawla、Ritu Kapoor、Lal Dhar S. Yadav
DOI:10.1016/j.tetlet.2019.150964
日期:2019.8
oxidative decarboxylative sulfono functionalization of cinnamic acids with sulfinate salts mediated by K2S2O8 under aerobic conditions to afford synthetically and biologically relevant β-ketosulfones has been described. It is the first report on the transition-metal-free synthesis of β-ketosulfones from cinnamic acids, which employs environmentally benign, readily available and inexpensive starting materials
已经描述了在好氧条件下用K 2 S 2 O 8介导的亚磺酸盐对肉桂酸的氧化脱羧磺酰基官能化的新范例,以提供合成上和生物学上相关的β-酮砜。这是关于从肉桂酸无β-酮砜的无过渡金属合成的第一份报告,该方法采用了环境友好,易得且廉价的起始原料和氧化剂,即。空气和K 2 S 2 O 8。
Aerobic oxysulfonylation of alkenes using thiophenols: an efficient one-pot route to β-ketosulfones
作者:Atul K. Singh、Ruchi Chawla、Twinkle Keshari、Vinod K. Yadav、Lal Dhar S. Yadav
DOI:10.1039/c4ob00776j
日期:——
We have developed a highly efficient synthetic route to β-ketosulfones via AgNO3 catalyzed oxysulfonylation of alkenes using thiophenols in the presence of air (O2) and K2S2O8 as eco-friendly oxidants. Thiophenols have been used as sulfonylation precursors for the first time in a dioxygen activation based radical process. Moreover, the protocol also offers a new and convenient method for the synthesis
我们已经开发出了一种高效的合成路线,该路线是在空气(O 2)和K 2 S 2 O 8作为生态友好型氧化剂的情况下,通过使用苯硫酚通过AgNO 3催化的烯烃的氧磺酰化反应。硫酚在基于双氧活化的自由基工艺中首次被用作磺酰化前体。此外,该方案还提供了一种在不使用任何引发剂的情况下,在室温下合成β-羟基硫化物的新型便捷方法。
Efficient sulfonylation of ketones with sodium sulfinates for the synthesis of β-keto sulfones
作者:Siqi Deng、En Liang、Yinrong Wu、Xiaodong Tang
DOI:10.1016/j.tetlet.2018.09.049
日期:2018.10
The oxidative sulfonylation of ketones with sodium sulfinates as the sulfone source and DMSO as the oxidant is reported. A series of β-keto sulfones were obtained in good to excellent yields. The advantages of this efficient protocol include the low cost of DMSO and HBr, and a broad scope.