Synthesis of arylated anthraquinones by site-selective Suzuki–Miyaura reactions of the bis(triflates) of 1,3-di(hydroxy)anthraquinones
作者:Omer A. Akrawi、Afsar Khan、Tamás Patonay、Alexander Villinger、Peter Langer
DOI:10.1016/j.tet.2013.08.041
日期:2013.10
were prepared by Suzuki–Miyaurareactions of the bis(triflates) of various 1,3-(dihydroxy)anthraquinones. While the reactions of the bis(triflates) of parent 1,3-(dihydroxy)anthraquinone and of 2-chloro-1,3-di(hydroxy)anthraquinone proceeded with very good site-selectivity, the corresponding reactions of the bis(triflate) of 2-fluoro-1,3-diarylanthraquinones were not site-selective, which was explained
Substituted 3,5-dioxopimelic acid diesters, stable 1,3,5,7-tetracarbonyl derivatives, were prepared by condensation of 1,3-bis(trimethylsilyloxy)-1,3-butadienes with methyl malonyl chloride. The influence of the substituents and the solvent on the keto–enoltautomerization of these compounds was investigated by NMR spectroscopy. For the parent compound, the experimental findings were compared with
Synthesis and reactions of 2-chloro-1,3-bis(trimethylsilyloxy)-1,3-butadienes
作者:Stefanie Reim、Muhammad Adeel、Ibrar Hussain、Mirza A. Yawer、Zafar Ahmed、Alexander Villinger、Peter Langer
DOI:10.1016/j.tetlet.2008.05.151
日期:2008.8
The reaction of 2-chloro-1,3-bis(trimethylsilyloxy)-1,3-butadienes with various electrophiles allows a convenient synthesis of chlorinated molecules which are not readily available by other methods. (C) 2008 Elsevier Ltd. All rights reserved.