Alternative Palladium-Catalyzed Vinylic C−H Difluoroalkylation of Ketene Dithioacetals Using Bromodifluoroacetate Derivatives
作者:Shuangquan Tian、Xiaoning Song、Dongsheng Zhu、Mang Wang
DOI:10.1002/adsc.201701554
日期:2018.4.3
A palladium‐catalyzedcross‐coupling of α‐oxo ketene dithioacetals and bromodifluoroacetate derivatives has been developed for the synthesis of a class of CF2‐containing tetra‐substituted olefins, which has potential to extend to drug design and material application. The process is proposed to involve two single electron transfer processes accompanied by an alternative loop from palladium(0) to palladium(I)
A tandem reaction of 2-acetylmethylene-1,3-dithiolanes via fragmentation of the dithiolane ring in the presence of amines: a facile route to functionalized thioamides
作者:Fushun Liang、Yan Li、Dazhi Li、Xin Cheng、Qun Liu
DOI:10.1016/j.tetlet.2007.09.065
日期:2007.11
A facile and efficient route to functionalized thioamides has been developed by a tandem reaction of 2-acetylmethylene-1,3-dithiolanes via fragmentation of the dithiolane ring upon heating and in the presence of an amine.
Vilsmeier-Haack Reaction of α-Oxo Ketene Dithioacetals to α-Chlorovinyl/Ethynyl Ketene Dithioacetals
作者:Dewen Dong、Qun Liu、Yingchun Liu、Yulong Zhao、Yimei Qi、Zhuo Wang
DOI:10.1055/s-2004-834901
日期:——
A range of α-oxo ketene dithioacetals 1 reacted with Vilsmeier reagent (POCl3/DMF) to afford α-chlorovinyl ketene dithioacetals 2. With the treatment of NaOH in ethanol or methanol, the compounds 2 were transformed into the corresponding α-ethynyl ketene dithioacetals 3 in moderate to high yields.