Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 34, Pages 10012-10015Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201504962
Keywords
C-H activation; annulations; cobalt; ligand design; nitrogen oxides
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Funding
- National Natural Science Foundation of China [21272217]
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A highly efficient cobalt(II)-catalyzed alkynylation/annulation of terminal alkynes assisted by an N, O-bidentate directing group is described. This protocol is characterized by wide substrate scope utilizing cheap cobalt catalysts, and offers a new approach to 3-methyleneisoindolin-1-one, which can be converted into an oxadiazine salt in one step. Moreover, the directing group could be removed in three steps.
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