766-46-1Relevant articles and documents
Facile Synthesis of Dibenzotetracenedione Derivatives by Rhodium-Catalyzed [2+2+2] Cycloaddition/Spontaneous Aromatization
Aida, Yukimasa,Shibata, Yu,Tanaka, Ken
, p. 1823 - 1829 (2019)
It has been established that a cationic rhodium(I)/SEGPHOS complex catalyzes the [2+2+2] cycloaddition of biphenyl-linked 1,7-diynes with 1,4-naphthoquinone and anthracene-1,4-dione. Conveniently, spontaneous aromatization proceeded upon removal of the rhodium complex by passing the reaction mixture through an alumina column, to give the corresponding dibenzotetracenediones and dibenzopentacenediones, respectively, in good yields. The obtained dibenzotetracenedione could be readily transformed into the corresponding dibenzotetracene in good yield. This dibenzotetracene showed blue fluorescence with a good quantum yield, which was significantly higher than those of tetracene, tetrabenzotetracene, and hexabenzotetracene.
An on-surface Diels–Alder reaction
Albrecht, Florian,Castro-Esteban, Jesús,Fatayer, Shadi,Gross, Leo,Pérez, Dolores,Pe?a, Diego
supporting information, p. 26346 - 26350 (2021/11/13)
The Diels–Alder reaction is one of the most popular reactions in organic chemistry. However, its use in the field of on-surface synthesis is hampered by the spatial restrictions of this cycloaddition reaction. Herein we selected a cyclic strained triyne t
Selective Synthesis of Phenanthrenes and Dihydrophenanthrenes via Gold-Catalyzed Cycloisomerization of Biphenyl Embedded Trienynes
Milián, Ana,Garciá-Garciá, Patricia,Pérez-Redondo, Adrián,Sanz, Roberto,Vaquero, Juan J.,Fernández-Rodríguez, Manuel A.
supporting information, p. 8464 - 8469 (2020/11/02)
Readily available o′-alkenyl-o-alkynylbiaryls, a particular type of 1,7-enynes, undergo a selective cycloisomerization reaction in the presence of a gold(I) catalyst to give interesting phenanthrene and dihydrophenanthrene derivatives in high yields. The solvent used provokes a switch in the evolution of the gold intermediate and plays a key role in the reaction outcome.