A rhodium catalyst induced ring opening of benzocyclobutenols with selective cleavage of the C(sp(2))-C(sp(3)) bond adjacent to the hydroxyl group. The site-selectivity markedly contrasted with that of their thermal ring-opening reaction. The rhodium-catalyzed ring opening led to the development of a new alkyne insertion reaction constructing a dihydronaphthalene framework.
Trifluoromethyl-Substituted Benzocyclobutenone and Benzocyclobutenedione: The Structure Anomaly of (Benzocyclobutenedione)tricarbonylchromium Complexes
作者:Monika Böning née Pfennig、Krishna Gopal Dongol、Geanne Marize Romero Boston、Stefan Schmitz、Rudolf Wartchow、Juan D. Samaniego-Rojas、Andreas M. Köster、Holger Butenschön
DOI:10.1021/acs.organomet.9b00370
日期:2019.8.12
show that annelated cyclobutenedione rings bend more strongly toward the tricarbonylchromium group than do their cyclobutenone analogues. Moreover, the staggered conformation of the tricarbonylchromium group favors larger bending angles. Topological analyses of the electron density of the studied (arene)tricarbonylchromiumcomplexes suggest that the cyclobutenedione ring bending originates from the bending