Synthesis of tetrafunctionalized pentiptycenequinones for construction of cyclic dimers with a cylindrical shape by boronate ester formation
作者:Shigehisa Akine、Daisuke Kusama、Yuri Takatsuki、Tatsuya Nabeshima
DOI:10.1016/j.tetlet.2015.06.070
日期:2015.8
New tetrasubstituted pentiptycenequinone derivatives 1 and 2 having two sets of dial 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 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. (C) 2015 Elsevier Ltd. All rights reserved.