185302-86-7Relevant articles and documents
Synthesis of 4-(2-fluorophenyl)-7-methoxycoumarin: Experimental and computational evidence for intramolecular and intermolecular C-F?H-C bonds
Grimmer, Craig,Mzozoyana, Vuyisa,Van Heerden, Fanie R.
, p. 190 - 199 (2020/03/27)
4-(2-Fluorophenyl)-7-methoxycoumarin (6) was synthesized by Pechmann reaction under mild conditions via a three-step reaction. The solution-state 1H NMR spectra of 6 showed a strong intramolecular interaction between F and H5 (JFH = 2.6 Hz) and 13C NMR suggested that this C-F?H-C coupling is a through-space interaction. The 2D 19F-{1H} HOESY and 1H-{19F} 1D experiments were done to confirm this F?H interaction. The single crystal X-ray structure and the DFT-optimized structure showed that the fluorinated phenyl ring favors the orientation with the fluorine atom closer to H5 than H3. The X-ray structure also showed the existence of the intermolecular C-F?H-C interaction.
Iron-catalysed 1,2-acyl migration of tertiary α-azido ketones and 2-azido-1,3-dicarbonyl compounds
Yang, Tonghao,Lin, Yajun,Yang, Chaoqun,Yu, Wei
supporting information, p. 6097 - 6102 (2019/11/20)
Iron-catalysed 1,2-acyl migration of tertiary α-azido ketones and 2-azido-1,3-dicarbonyl compounds provides a simple and atom-economical approach toward enamides and isoquinolones. This paper reports two catalyst systems for these transformations which employ iron(ii) complexes [Fe(dpbz)]Br2 (dpbz = 1,2-bis(diphenylphosphino)benzene) and FeBr2/Et3N, respectively. [Fe(dpbz)]Br2 was found to be highly effective at converting 2-azido-2,3-dihydro-1H-inden-1-ones to isoquinolones. The reagent combination of FeBr2/Et3N, on the other hand, exhibited a broader catalytic scope, owing to the beneficial effect of Et3N. This latter catalyst system enables 2-azido-2-methyl-1,3-dicarbonyl compounds to be converted to the corresponding enamides under mild conditions in good yields.
Transition metal-free one-pot synthesis of 2-substituted 3-carboxy-4-quinolone and chromone derivatives
Lin, Jian-Ping,Long, Ya-Qiu
supporting information, p. 5313 - 5315 (2013/06/27)
A novel one-pot synthesis of the 2-substituted 3-carboxy-4-quinolone/ chromone derivatives from readily available 3-oxo-3-arylpropanoates and amides/acyl chlorides is reported, without any transition metal aid. The Royal Society of Chemistry 2013.
PYRROLOPYRIDINE THERAPEUTIC COMPOUNDS
-
Page/Page column 12, (2010/11/03)
The present invention relates to pyrrolopyridine compounds of Formula (I) wherein Ar, Ar1 and R1 are defined herein, and pharmaceutically acceptable salts thereof; pharmaceutical compositions comprising them, and their use for the treatment and prevention of infection by hepatitis C virus.
Baccatin derivatives and a process for producing the same
-
, (2008/06/13)
The object of the invention is to develop baccatin derivatives useful for preparing taxoid compounds such as paclitaxel and a process for the producing the same. The invention provides baccatin derivatives represented by the general formula (I) as well as a process for producing baccatin derivatives represented by the general formula (I) above, which comprises allowing a baccatin represented by the general formula (II) to react with a β-ketoester in the absence of a catalyst or in the presence of a tin compound or an amine base, preferably under reduced pressure.