Diels–Alder reactions of perfluoroketene dithioacetals with electron-rich 1,3-dienes: a new access to polysubstituted aromatic sulfides
作者:Jean-Philippe Bouillon、Sergiy Mykhaylychenko、Sigismund Melissen、Agathe Martinez、Dominique Harakat、Yuriy G. Shermolovich
DOI:10.1016/j.tet.2012.07.054
日期:2012.10
The present paper describes the Diels–Alder reactions of perfluoroketene dithioacetals with electron-rich 1,3-dienes (2,3-dimethylbuta-1,3-diene, isoprene, penta-1,3-diene) followed by spontaneous HF and thiol elimination, leading to polysubstituted aromatic sulfides in moderate to good yields. Reactions seem to be dependent on the substitution patterns of perfluoroketene dithioacetals; the best results
Synthesis of fluorinated vinyl sulfides and selenides
作者:S. Piettre、Ch. De Cock、R. Merenyi、H.G. Viehe
DOI:10.1016/s0040-4020(01)90306-0
日期:1987.1
The reaction between fluoroolefins 1 and 10e and benzenesulfenyl or selenenyl halides 6 is found to be solvent-dependent and gives in most cases predominantly the regioisomer 8.The structure of adducts 8 and 9 are ascertained by 1H, 19F and 77Se NMR spectroscopy. Compounds 8 are easily halogenated and treatment of the products with magnesium or zinc leads to the desired polyfluorovinyl Sulfides and
发现氟代烯烃1和10e与苯硫基或硒烯基卤化物6之间的反应是溶剂依赖性的,并且在大多数情况下主要给出区域异构体8。加合物8和9的结构通过1 H,19 F和77 Se NMR光谱确定。化合物8容易被卤化,并且用镁或锌处理产物产生所需的多氟乙烯基硫化物和硒化物10。这些试剂的第二种合成路线是由(氟乙烯基硫代衍生物11与苯硫基或亚硒基卤化物。烯烃10e也由三氟乙醛的硒缩醛8t获得。
Fluorinated ketene dithioacetals. 2. Synthesis of 2-hydroperfluoro acid derivatives from perfluoroketene dithioacetals
作者:Murielle Muzard、Charles Portella
DOI:10.1021/jo00053a010
日期:1993.1
Perfluoroketene dithioacetals were prepared in high yields from perfluoroaldehyde hydrates via their thioacetalization (TiCl4/CH2Cl2) followed by basic phase transfer catalyzed HF elimination. Acidic hydrolysis (CF3CO2H, H2O) and then transesterification (EtOH, Ti(OiPr)4) yielded S-alkyl 2-hydroperfluoro thioesters and ethyl 2-hydroperfluoro esters, respectively.
DE, COCK, CH.;PIETTRE, S.;LAHOUSSE, F.;JANOUSEK, Z.;MERENYI, R.;VIEHE, H.+, TETRAHEDRON, 1985, 41, N 19, 4183-4193