98421-80-8Relevant academic research and scientific papers
Functionalization of a Single C?F Bond of Trifluoromethylarenes Assisted by an ortho-Silyl Group Using a Trityl-Based All-in-One Reagent with Ytterbium Triflate Catalyst
Kim, Youngchan,Kanemoto, Kazuya,Shimomori, Ken,Hosoya, Takamitsu,Yoshida, Suguru
supporting information, p. 6136 - 6140 (2020/05/20)
Catalytic thiolation and azidation of a single C?F bond of trifluoromethylarenes were achieved assisted by an ortho-silyl group with all-in-one reagents to generate a trityl cation and nucleophiles. The reactions catalyzed by ytterbium triflate efficientl
Structural and solvent effects on the C-S bond cleavage in aryl triphenylmethyl sulfide radical cations
Del Giacco, Tiziana,Lanzalunga, Osvaldo,Mazzonna, Marco,Mencarelli, Paolo
, p. 1843 - 1852 (2012/04/23)
Steady-state and laser flash photolysis (LFP) studies of a series of aryl triphenylmethyl sulfides [1, 3,4-(CH3O)2-C 6H3SC(C6H5)3; 2, 4-CH3O-C6H4SC(C6H5) 3; 3, 4-CH3-C6H4SC(C 6H5)3; 4, C6H5SC(C 6H5)3; and 5, 4-Br-C6H 4SC(C6H5)3] has been carried out in the presence of N-methoxyphenanthridinium hexafluorophosphate in CH 3CN, CH2Cl2, CH2Cl 2/CH3CN, and CH2Cl2/CH3OH mixtures. Products deriving from the C-S bond cleavage in the radical cations 1?+-5?+ have been observed in the steady-state photolysis experiments. Time-resolved LFP showed first-order decay of the radical cations accompanied by formation of the triphenylmethyl cation. A significant decrease of the C-S bond cleavage rate constants was observed by increasing the electron-donating power of the arylsulfenyl substituent, that is, by increasing the stability of the radical cations. DFT calculations showed that, in 2?+ and 3?+, charge and spin densities are mainly localized in the ArS group. In the TS of the C-S bond cleavage an increase of the positive charge in the trityl moiety and of the spin density on the ArS group is observed. The higher delocalization of the charge in the TS as compared to the initial state is probably at the origin of the observation that the C-S bond cleavage rates decrease by increasing the polarity of the solvent.
Synthesis of novel alkyl- and aryl sulfides and thiols as precursors for self-assembled monolayers on gold
Touaibia, Mohamed,Desjardins, Marc-Andre,Provencal, Alexandre,Audet, Daniel,Medard, Christelle,Morin, Mario,Breau, Livain
, p. 2283 - 2288 (2007/10/03)
A series of 4-alkyl-1-bromosulfanylbenzenes having S-methyl 2, S-t-butyl 3, S-trityl 4, S-benzyl S, and S-silylethoxymethyl 6 substituents were prepared and evaluated for their ability to form a monolayer consisting of an S-aryl adsorbate on Au (111) surf
