Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 55, Issue 32, Pages 9416-9421Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201602347
Keywords
late-stage functionalization; monofluoroalkenylation; photoredox catalysis; radical coupling; C-H activation
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An unprecedented and challenging radical-radical cross-coupling of alpha-aminoalkyl radicals with monofluoroalkenyl radicals derived from gem-difluoroalkenes was achieved. This first example of tandem C(sp(3))-H and C(sp(2))-F bond functionalization through visible-light photoredox catalysis offers a facile and flexible access to privileged tetrasubstituted monofluoroalkenes under very mild reaction conditions. The striking features of this redox-neutral method in terms of scope, functional-group tolerance, and regioselectivity are illustrated by the late-stage fluoroalkenylation of complex molecular architectures such as bioactive (+)-diltiazem, rosiglitazone, dihydroartemisinin, oleanic acid, and androsterone derivatives, which represent important new alpha-amino C-H monofluoroalkenylations.
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