41253-01-4Relevant academic research and scientific papers
Pd-Catalyzed Decarboxylative Ortho-Halogenation of Aryl Carboxylic Acids with Sodium Halide NaX Using Carboxyl as a Traceless Directing Group
Fu, Zhengjiang,Jiang, Yongqing,Wang, Shuiliang,Song, Yuanyuan,Guo, Shengmei,Cai, Hu
supporting information, p. 3003 - 3007 (2019/05/10)
A highly regioselective Pd-catalyzed carboxyl directed decarboxylative ortho-C-H halogenation of cheap o-nitrobenzoic acids with NaX (X = I, Br) under aerobic conditions has been established. The utility of the method has been demonstrated by the gram-scale reaction and derivatization of the product. Experimental results have confirmed Pd and Bi played critical roles in the transformation and indicated the transformation might proceed via 2-halo-6-nitrobenzoic acid derivative intermediate.
Method for synthesizing m-iodonitrobenzene compound
-
Paragraph 0075-0076, (2018/03/24)
Provided is a method for synthesizing m-iodonitrobenzene; in the presence of oxygen gas, a palladium catalyst, a copper additive, a bismuth reagent and potassium phosphate, an o-nitrobenzoic acid compound and metal iodide are subjected to a substitution reaction in an organic solvent to form a corresponding m-iodonitrobenzene compound, wherein a metal in the metal iodide is an alkali metal or an alkaline earth metal. The method has obvious advantages of cheap and easily obtained reaction raw materials (including o-nitrobenzoic acid and MI), small amount of the metal catalyst, minimum environmental pollution with oxygen gas as an oxidant, good tolerance on various functional groups on an aromatic ring and the like. The method can be widely applied in the fields of synthesis of drugs, materials, natural products and the like in industrial and academic circles.
Oxindole derivatives as orally active potent growth hormone secretagogues
Tokunaga,Hume,Umezome,Okazaki,Ueki,Kumagai,Hourai,Nagamine,Seki,Taiji,Noguchi,Nagata
, p. 4641 - 4649 (2007/10/03)
A series of substituted oxindole derivatives was synthesized and evaluated for growth hormone (GH) releasing activity using cultured rat pituitary cells. (+)-6-Carbamoyl-3-(2-chlorophenyl)-(2-diethylaminoethyl)- 4-trifluoromethyloxindole (SM-130686, 37S) was found to have potent activity (EC50 = 3.0 nM), while the other enantiomer 37R had reduced activity. The absolute configuration of 37S was confirmed by X-ray crystallographic analysis. Compound 37S showed a good pharmacokinetic profile in rats with 28% oral bioavailability at 10 mg/kg and excellent in vivo activity as evidenced by a significant weight gain after 4 days of oral administration at 10 mg/kg twice a day. Compound 37S displaced the binding of 35S-MK-677 to human GHS-R with an IC50 value of 1.2 ± 0.2 nM.
Elemental fluorine. Part 4. Use of elemental fluorine for the halogenation of aromatics
Chambers, Richard D.,Skinner, Christopher J.,Atherton, Malcolm J.,Moilliet, John S.
, p. 1659 - 1664 (2007/10/03)
New methodolgy for direct iodination of benzenoid compounds has been developed; the aromatic substrate is simply mixed with iodine and sulfuric acid, suspended in an inert medium, such as 1,1,2-trichlorotrifluoroethane (CF2ClCFCl2) or perfluorocarbon, and elemental fluorine is passed through the system at room temperature. High conversions to iodoaromatic products occur, even with some deactivated systems, e.g. nitrobenzene. A very powerful brominating system is produced using the analagous methodology.
