189. 2 : 3-Benzorubicene, rubicene, and their derivatives
作者:E. Clar、W. Willicks
DOI:10.1039/jr9580000942
日期:——
A Synthesis of Rubrene
作者:C. F. H. Allen、Lucius Gilman
DOI:10.1021/ja01297a028
日期:1936.6
Steric and Electronic Substituent Effects Influencing Regioselectivity of Tetracene Endoperoxidation
作者:Rom Nath Baral、Samuel W. Thomas
DOI:10.1021/acs.joc.5b01692
日期:2015.11.6
This paper describes the influence of steric and electronic factors in the regioselectivity of endoperoxide formation of tetracene derivatives using O-1(2). A combination of kinetics experiments and product distributions resulting from these photosensitized oxidations demonstrates that, while the steric effect of o-alkyl groups on aryl substituents is highly localized to the substituted ring, the resistance to oxidation based on phenylethynyl substituents is more evenly distributed between the two reactive rings. These results are important for the rational design of highly persistent acenes.