BARTON J. W.; WALKER R. B., TETRAHEDRON LETT. <TELE-AY>, 1975, NO 8, 569-572
作者:BARTON J. W.、 WALKER R. B.
DOI:——
日期:——
The Cobalt-Way to Heterophenylenes: Syntheses of 2-Thianorbiphenylenes, Monoazabiphenylenes, and Linear 1-Aza[3]phenylene {Biphenyleno[2,3-a]cyclobuta[1,2-b]pyridine}
CpCo(CO) 2 catalyzes the cocyclization of ortho-diethynylthiophenes and -pyridines with alkynes to construct the corresponding thia- and azaphenylenes. This strategy is applied to the synthesis of linear 1-aza[3]phenylene, the first higher heterophenylene.
Catalyst-Counterion Controlled, Regioselective C–C Bond Cleavage in 1-Azabiphenylene: Synthesis of Selectively Substituted Benzoisoquinolines
作者:David Frejka、Jan Ulč、Eric Assen B. Kantchev、Ivana Císařová、Martin Kotora
DOI:10.1021/acscatal.8b01874
日期:2018.11.2
Catalytic C–Cbondcleavage processes followed by further transformations are some of the most fascinating reactions in chemistry and valuable organic synthesis tools. Herein, we demonstrate that the regioselectivity of C–Cbondcleavage in 1-azabiphenylene and its derivatives can be switched by using neutral or cationic transition metal catalysts. The use of the former leads to selectivedistalC–C bond