Investigation of radical cation in electrophilic fluorination by ESI-MS.
Reaction solutions of selectfluor (1) with triphenylethylene (4a) and tetraphenylethylene (4b) were monitored by ESI-MS and ESI-MS/MS. Detection and characterization of the key radical cationic intermediates 5a.+ and 5b.+) fully supports the SET mechanism in electrophilic fluorination as depicted above. [reaction: see text]
Zhang
Xiang
X
Shanghai Mass Spectrometry Center, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China.
Liao
Yuanxi
Y
Qian
Rong
R
Wang
Haoyang
H
Guo
Yinlong
Y