Palladium-Catalyzed Oxidative Double CH Functionalization/Carbonylation for the Synthesis of Xanthones
作者:Hua Zhang、Renyi Shi、Pei Gan、Chao Liu、Anxing Ding、Qiuyi Wang、Aiwen Lei
DOI:10.1002/anie.201201050
日期:2012.5.21
Two at once: Xanthones with different functional groups were obtained with CO (balloon) in the presence of a simple catalytic system that consists of Pd(OAc)2, K2S2O8, and trifluoroacetic acid (see scheme). Preliminary mechanism studies reveal that the second CHfunctionalization might be the rate‐determining step.
一次两个:在简单的催化体系(由Pd(OAc)2,K 2 S 2 O 8和三氟乙酸组成)的存在下,用CO(气球)获得具有不同官能团的氧杂蒽。初步的机理研究表明,第二个CH功能化可能是决定速率的步骤。
New Gas-Phase Domino Processes Leading to Benzopyranones and Benzofurans
作者:R. Alan Aitken、Da Chang
DOI:10.3987/com-15-s(t)14
日期:——
A newdomino approach to flavones by gas phase pyrolysis of β,γ-dioxophosphonium ylides containing a 2-methoxyphenyl group is frustrated by unexpected and novel decarbonylation of the intermediate flavon-3-yl radical leading to 2-phenylbenzofuran. Alternative approaches based on dioxolane protection of one carbonyl, or selective elimination in β,β'-dioxo or β-oxo-β'-thioxo ylides were not successful
12H-BENZO[b]XANTHEN-12-ONES, COMPOSITIONS CONTAINING, AND USES OF, SAME
申请人:Beeley Nigel Robert Arnold
公开号:US20180185325A1
公开(公告)日:2018-07-05
The present invention provides compounds of the following structure,
methods of using such compounds, and pharmaceutical compositions containing such compounds. In addition, this invention provides methods for the treatment and/or prevention of disease states mediated by Aryl Hydrocarbon receptor pathways.