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SUMMARY:AC Kolloquium - Professor Dr. Hayato Tsurugi
DTSTART;TZID=Europe/Berlin:20251111T160000
DTEND;TZID=Europe/Berlin:20251111T170000
DTSTAMP:20260518T175714Z
UID:04bdcf7b8a134895a788c3a7d637c244@www.chemie.uni-bonn.de
CATEGORIES:ac-events,Lu-events
CREATED:20250924T115406Z
DESCRIPTION:Catalytic Syntheses of Five-membered Cyclic Compounds via -
 Unsaturated Early Transition Metal Alkylidene Intermediates\n\nCyclopentad
 ienes and pyrroles are synthetically valuable five-membered cyclic compoun
 ds. Transition metal-catalyzed [2+2+1]-cycloaddition reactions involving t
 wo simple alkynes and a carbene or nitrene precursor offer an efficient an
 d atom-economical route to these compounds. However\, the scope of suitabl
 e carbene and nitrene precursors remains limited in such catalytic transfo
 rmations. In this presentation\, I will introduce our strategy employing c
 yclopropenes and azoarenes as novel substrates for unprecedented [2+2+1]-c
 ycloaddition reactions with alkynes. These reactions are catalyzed by low-
 valent early transition metal complexes such as niobium and tungsten\, and
  proceed via key intermediates featuring β-unsaturated metal alkylidene s
 pecies.
LAST-MODIFIED:20251002T072718Z
URL:https://www.chemie.uni-bonn.de/lu/de/lu-events/ac-kolloquium-professor
 -dr-hayato-tsurugi
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