Palladium-catalyzed synthesis of cyclopentane-fused benzocyclobutenes via tandem directed carbopalladation/C-H bond functionalization.
A new Pd-catalyzed reaction for the stereoselective synthesis of cyclopentane-fused benzocyclobutenes is described. These transformations likely proceed via carbamate-directed carbopalladation followed by intramolecular C-H activation of an alkylpalladium intermediate. The mechanistic relationship between these transformations and Pd-catalyzed reactions of gamma-(n-Boc-amino)alkenes with aryl bromides that afford pyrrolidines is discussed. Differences in reactivity between Pd-amino and Pd-amido complexes appear to play a key role in the outcome of these transformations.
Bertrand
Myra Beaudoin
MB
Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055, USA.
Wolfe
John P
JP
D002384:Catalysis; D003517:Cyclopentanes / Q000138:chemical synthesis*; D015394:Molecular Structure; D010165:Palladium / Q000737:chemistry*; D011083:Polycyclic Compounds / Q000138:chemical synthesis*; D013237:Stereoisomerism
D003517:Cyclopentanes; D011083:Polycyclic Compounds; C079040:benzocyclobutene; D010165:Palladium