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SUMMARY:From Alkyne Origami and Metal-Free C-H Aminations to Electron Upcon
 version: An Array of New Tools for Solving the Ouroboros Problem
LOCATION:Chemistry A101
TZID:America/Denver
DTSTART:20180001T000000
UID:2026-04-28-15-58-29@natsci.colostate.edu
DTSTAMP:20260428T155829
Description:In this talk\, I will present a selection of new synthetic stra
 tegies for assembling poly- and heteroaromatic systems.\n\nIn the 1st part
 \, I will discuss the advantages of alkynes as high-energy carbon-rich pre
 cursors for extended polyaromatics\, the two general patterns of oligoalky
 ne folding into an aromatic ribbon\, and the use of supramolecular effects
  in the design of traceless directing groups for radical reactions.\n\nIn 
 the 2nd part\, I will present a mild method for oxidative C(sp3)–H amina
 tion from unprotected anilines and C(sp3)–H bonds. In this process\, bas
 ic\, radical\, and oxidizing species work together in a coordinated sequen
 ce of deprotonation\, H-atom transfer and electron transfer that forges a 
 new C–N bond. I will also introduce reductant upconversion\, a new conce
 pt in catalysis\, and show how it can be used for preventing the premature
  entry of oxidants into reaction cascades.\n\nReferences: Acc. Chem. Res.\
 , 2018\, 51\, 1206-1219. Angew. Chem. Int. Ed.\, 2018\, 57\, https://doi.o
 rg/10.1002/anie.201807247. 4:00 pm
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