613-06-9Relevant articles and documents
Synthesis of annulated arenes and heteroarenes by hydriodic acid and red phosphorus mediated reductive cyclization of 2-(Hetero)aroylbenzoic acids or 3-(Hetero)arylphthalides
Rafiq, Settu Muhamad,Mohanakrishnan, Arasambattu K.
supporting information, p. 362 - 370 (2017/02/10)
Annulated arenes and hetarenes were prepared in good to very good yields by hydriodic acid/red phosphorus mediated reductive cyclization of 3-(hetero)aryl phthalides. The reductive cyclization also proceeded successfully with 2-aroylbenzoic acids and 2-aroylnaphthoic acids.
Synthesis of tetrafunctionalized pentiptycenequinones for construction of cyclic dimers with a cylindrical shape by boronate ester formation
Akine, Shigehisa,Kusama, Daisuke,Takatsuki, Yuri,Nabeshima, Tatsuya
, p. 4880 - 4884 (2015/07/28)
Abstract New tetrasubstituted pentiptycenequinone derivatives 1 and 2 having two sets of diol moieties in a syn orientation were synthesized from the corresponding 2,3-disubstituted anthracene derivatives. The semicircular scaffold of these molecules is expected to be useful to create a belt-like structure having an aromatic π-wall. Indeed, the reaction of 1 with 1,4-phenylenediboronic acid or 4,4′-biphenyldiboronic acid quantitatively gave a 2:2 macrocyclic product via boronate ester formation. The efficient formation of these cyclic structures can be explained by favorable intramolecular cyclization at the final step.
Nitrous oxide oxidation catalyzed by ruthenium porphyrin complex
Tanaka, Hirotaka,Hashimoto, Kentaro,Suzuki, Kyosuke,Kitaichi, Yasunori,Sato, Mitsuo,Ikeno, Taketo,Yamada, Tohru
, p. 1905 - 1914 (2007/10/03)
Dinitrogen oxide was employed as a clean oxidant for various oxidations in the presence of a catalytic amount of dioxoruthenium tetramesitylporphyrin complex (Ru(tmp)(O)2). A variety of olefins, secondary alcohols, and benzyl alcohols were smoothly oxidized to the corresponding epoxides, ketones, and aldehydes in high yields. In the oxidation of 9,10-dihydroanthracene derivatives, the competitive reactions affording anthraquinones and anthracenes could be regulated by the reaction conditions. At a high temperature (200°C), anthraquinones were selectively produced, while the anthracenes were selectively produced by the addition of sulfuric acid.