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SUMMARY:Phenothiazinium Amine Salts as Versatile Reagents towards Nitrogen 
 Centered Radical Reactivity
LOCATION:Chemistry A101
TZID:America/Denver
DTSTART:20260518T160000
UID:2026-09-27-16-13-02@natsci.colostate.edu
DTSTAMP:20260927T161302
Description:Seminar Abstract:\n\nOrganosulfonium salts have recently seen a
 n increase in utility as a handle towards a wide variety of powerful synth
 etic transformations. This is highlighted by the reactivity of thianthreni
 um salts and derivatives across transition-metal (TM) catalysis\, photoche
 mistry\, electrochemistry\, and radical polar crossover (RPC) reactions. A
 ryl sulfonium salt synthesis (e.g.\, thianthrenium and phenothiazinium spe
 cies) has been extensively developed relative to their alkyl variants\, wh
 ich are highly limited when it comes to their incorporation into 20\, 30\,
  and even complex structures that include preinstalled directing groups. I
  propose that the facile synthesis of phenothiazinium amine salts as well 
 as their photoinduced homolytic cleavage of the sulfilimine bond can be ut
 ilized to both exploit the high reactivity of the nitrogen centered radica
 l (NCR) intermediate and consequently trap the resulting radical species w
 ith the persistent phenothiazinium radical cation. The overall transformat
 ion would result in the displacement of phenothiazinium group via photoind
 uced activation\, providing access to a wide variety of complex phenothiaz
 inium salt derivatives as a handle towards additional valuable products. 4
 :00 pm
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