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SUMMARY:Anaerobic Heteroatom Transfer Reactions Promoted by Photoexcited 1,
 3-Dipoles
LOCATION:Chemistry A101
TZID:America/Denver
DTSTART:20250310T160000
UID:2026-04-25-16-05-34@natsci.colostate.edu
DTSTAMP:20260425T160534
Description:About the Seminar:\n\nHeteroatom units\, such as carbonyls\, al
 cohols\, and amines\, are prevalent motifs in many medicinally important c
 ompounds. Methods to incorporate these important functional groups at the 
 expense of hydrocarbons rely on the use of non-commercial heteroatom trans
 fer agents\, precious transition metals\, and/or costly engineered enzymes
 . Also\, these methods often require exogenous oxidants to promote the Câ€
 “heteroatom bonding event\, which greatly limits substrate scope. Our labo
 ratory focuses on the employment of economical 1\,3-dipoles as versatile r
 eagents that can serve as the hydrocarbon activator and the heteroatom ato
 m source for the heteroatom incorporation of aliphatic systems under benig
 n visible-light irradiation. Our contributions involve the cleavage of alk
 enes leading to valuable carbonyl derivatives and the direct C–H oxidati
 on of hydrocarbons via anaerobic oxygen-atom transfer from photoexcited ni
 troarenes. Using photoexcited azoxys\, an anaerobic nitrogen atom transfer
  event can occur leading to the aziridination of alkenes.  Mechanistic st
 udies reveal that the 1\,3-dipoles are the sole photo-absorbing species\, 
 which leads to the formation of diradical intermediates that are responsib
 le for heteroatom transfer events.\n\n&nbsp\; 4:00 pm
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