880348-64-1Relevant academic research and scientific papers
An efficient and straightforward route to terminal vinyl sulfones via palladium-catalyzed Suzuki reactions of α-bromo ethenylsulfones
Fang, Yewen,Yuan, Meijuan,Zhang, Juncong,Zhang, Li,Jin, Xiaoping,Li, Ruifeng,Li, Jinjian
, p. 1460 - 1463 (2016)
A general and simple protocol for the synthesis of α-substituted alkenylsulfones has been developed firstly via palladium-catalyzed Suzuki reactions between α-bromo ethenylsulfones and organoborons. Using a catalyst composed of Pd(OAc)2 and SPhos, a variety of aryl, heteroaryl, and alkylboron reagents could efficiently couple with α-bromo ethenylsulfones under mild conditions. Moreover, it has been demonstrated for the first time that vinyl sulfones underwent smooth reduction by diimide generated from 2-nitrobenzenesulfonylhydrazide.
Method for catalytically synthesizing alpha-aryl vinyl sulphone by aid of Pd
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Paragraph 0027; 0028; 0029, (2017/01/09)
The invention discloses a method for catalytically synthesizing alpha-aryl vinyl sulphone by the aid of Pd. The method includes particular steps of adding alpha-vinyl bromide sulphone, arylboronic acid, palladium acetate, cesium carbonate and Sphos into a reactor; vacuumizing the reactor and filling the reactor with nitrogen to remove oxygen; adding anhydrous toluene into the reactor in protection of the hydrogen and stirring the anhydrous toluene at the temperature of 50-80 DEG C for 10-20 h; carrying out reaction to obtain reaction mixtures, and then enabling the reaction mixtures to flow through silica gel columns to remove inorganic salt by the aid of ethyl acetate which is an eluting agent so as to obtain eluent; rotationally evaporating the eluent to remove the ethyl acetate and the toluene, then carrying out column chromatography separation on the eluent by the aid of petroleum ether and ethyl acetate mixed liquid which is used as an eluting agent and ultimately distilling the eluent to obtain the alpha-aryl vinyl sulphone. The method has the advantages of excellent universality of substrates, high compatibility of functional groups, mild reaction conditions and high reaction efficiency.
Stabilization of Organic Materials
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, (2008/12/04)
The invention describes a process for stabilizing an organic material against oxidative, thermal or light-induced degradation, which comprises incorporating therein or applying thereto at least a compound of the formula (I) wherein the general symbols are
