Reaction of nitrosonium trifluoromethanesulfonate with fluoroolefins and some properties of the resulting products
摘要:
The reaction of nitrosonium trifluoromethanesulfonate with fluoroolefins resulted in beta-nitrosofluoroalkyltrifluoromethanesulfonates, the corresponding 1,2-oxazetidines, and nitrosofluoro polymers. The nitroso compounds, under the effect of nitrogen tetroxide, were oxidized to beta-nitrofluoroalkyltrifluoromethanesulfonates. Pyrolysis of the oxazetidines and nitrosofluoro polymers resulted in the synthesis of fluoroazomethines containing the CF3SO2O group.
Synthesis and EPR/UV/Vis-NIR Spectroelectrochemical Investigation of a Persistent Phosphanyl Radical Dication
作者:Kai Schwedtmann、Stephen Schulz、Felix Hennersdorf、Thomas Strassner、Evgenia Dmitrieva、Jan J. Weigand
DOI:10.1002/anie.201502737
日期:2015.9.14
The reaction of the bis(imidazoliumyl)‐substituted PI cation [(2‐ImDipp)P(4‐ImDipp)]+ (10+) (2‐Im=imidazolium‐2‐yl; 4‐Im=imidazolium‐4‐yl; Dipp=2,6‐di‐isopropylphenyl) with trifluoromethanesulfonicacid (HOTf) or methyl trifluoromethylsulfonate (MeOTf) yields the corresponding protonated [(2‐ImDipp)PH(4‐ImDipp)]2+ (112+) and methylated [(2‐ImDipp)PMe(4‐ImDipp)]2+ (122+) dications, respectively. EPR/UV/Vis‐NIR
Specific and Strong Acceleration of Nitrosation by Nitrosyl Sulfonates Using the Bis-Coordinating Lewis Acid TiCl<sub>4</sub> or SnCl<sub>4</sub>
作者:G. Sudhakar Reddy、E. J. Corey
DOI:10.1021/acs.orglett.3c03768
日期:2024.1.19
Nitrosyl triflate is an excellent donor of NO+ to C═C and very unreactive benzenoids, in contrast to the much less reactive nitrosyl mesylate. However, both of these reagents are strongly activated by the bis-coordinating Lewis acids TiCl4 and SnCl4 and become super reactive NO+ donors. Strong catalysis and activation are even observed with the inherently less electrophilic nitrosyl trifluoroacetate
与活性较低的甲磺酸亚硝酰酯相比,三氟甲磺酸亚硝酰酯是 NO +向 C=C 和非常不活泼的苯类化合物的极佳供体。然而,这两种试剂均被双配位路易斯酸TiCl 4和SnCl 4强烈活化,并成为超反应性NO +供体。甚至用本身亲电性较低的三氟乙酸亚硝酰酯也观察到强催化和活化作用。单配位强路易斯酸,例如MeAlCl 2 ,相对无效。