Organocatalyzed benzannulation for the construction of diverse anthraquinones and tetracenediones
作者:Krishna Bahadur Somai Magar、Likai Xia、Yong Rok Lee
DOI:10.1039/c5cc00623f
日期:——
An efficient one-pot synthesis of anthraquinones and tetracenediones was achieved by l-proline catalyzed benzannulation of commercially available 1,4-naphthoquinones or 1,4-anthracenedione with a variety of α,β-unsaturated aldehydes in good to excellent yield.
作者:Robert A. Pascal、Andrey Dudnikov、LeaAnn A. Love、Xin Geng、Kelly J. Dougherty、Joel T. Mague、Christina M. Kraml、Neal Byrne
DOI:10.1002/ejoc.201700732
日期:2017.8.2
A series of propeller-shaped, C3-symmetric cyclophanes have been synthesized by the macrocyclization of 1,3,5-trimercaptobenzene (12) with either a tris[o-(halomethyl)aryl]phosphine (e.g. 11) or a tris[o-(halomethyl)aryl]benzene (e.g. 24). Two phosphine-capped cyclophanes (5 and 6) were prepared in this way; they proved to be configurationally stable, and both were resolved into pure enantiomers by
Higher Acenes by On‐Surface Dehydrogenation: From Heptacene to Undecacene
作者:Rafal Zuzak、Ruth Dorel、Marek Kolmer、Marek Szymonski、Szymon Godlewski、Antonio M. Echavarren
DOI:10.1002/anie.201802040
日期:2018.8.13
of the series of higher acenes up to previously unreported undecacene has been developed through the on‐surface dehydrogenation of partially saturated precursors. These molecules could be converted into the parent acenes by both atomic manipulation with the tip of a scanning tunneling and atomic force microscope (STM/AFM) as well as by on‐surface annealing. The structure of the generated acenes has been