A novel, practical protocol for the aerobic direct C–H acetoxylation of arenes, employing a recyclable heterogeneous rhodium catalyst, is reported herein. The trifluoroacetoxylation of 2-amido-substituted anthracenes proceeded at the 9-position with exclusive regioselectivity. The oxidation of variously substituted anthracenes and other polycyclic aromatics with molecular oxygen as a terminal oxidant
Solvent effects in the fluorination of aromatic molecules with ‘F-TEDA-BF4’
作者:Marko Zupan、Jernej Iskra、Stojan Stavber
DOI:10.1016/0022-1139(94)03146-q
日期:1995.1
The type of functionalization of an aromatic molecule achieved with 1-chloromethyl-4-fluoro-1,4-diazobicyclo-(2,2,2)octane bis-tetrafluoroborate, 'F-TEDA-BF4', in trifluoroacetic acid depends on its structure: naphthalene and phenanthrene gave fluorinated products, anthracene gave the trifluoroacetate, while an addition process occurred with 9-methoxy-phenanthrene in methanol, and an addition-elimination process in trifluoroacetic acid.