The present provides a condensed pyridine compound (I) represented by the following formula:
(wherein, R2 represents
ring A represents benzene ring, pyridine ring, thiophene ring or furan ring; and
B represents
its pharmaceutically acceptable salt or hydrates thereof, which is a clinically useful medicament having a serotonin antagonism, in particular, that for treating, ameliorating or preventing spastic paralysis or central muscle relaxants for ameliorating myotonia.
Catalytic Enantioselective Synthesis of Chiral Phthalides by Efficient Reductive Cyclization of 2-Acylarylcarboxylates under Aqueous Transfer Hydrogenation Conditions
作者:Bo Zhang、Ming-Hua Xu、Guo-Qiang Lin
DOI:10.1021/ol901674k
日期:2009.10.15
A new diamine ligand for asymmetrictransferhydrogenation (ATH) was discovered. The reductive cyclization of 2-acylarylcarboxylates was found to proceed highly stereoselectively by the new Ru complex-catalyzed ATH and subsequent in situ lactonization under aqueous conditions. It enables efficient access to a wide variety of 3-substituted phthalides in enantiomericallypure form.
Pd-free Sonogashira coupling: one pot synthesis of phthalide via domino Sonogashira coupling and 5-exo-dig cyclization
作者:Shubhendu Dhara、Raju Singha、Munmun Ghosh、Atiur Ahmed、Yasin Nuree、Anuvab Das、Jayanta K. Ray
DOI:10.1039/c4ra07639g
日期:——
Phthalides have been synthesized exclusively in one pot via Pd-free Sonogashira coupling.
邻苯二甲酸酯已经通过无钯Sonogashira偶联一锅法合成。
Directing the regioselectivity of rhodium(I) catalysed cyclisation of 2-alkynyl benzoic acids
作者:Bradley Y.-W. Man、Astrid Knuhtsen、Michael J. Page、Barbara A. Messerle
DOI:10.1016/j.poly.2013.06.010
日期:2013.9
Rhodium(I) dicarbonyl complexes 1–4 containing chelating N-donor ligands bis(pyrazolyl)methane (bpm), bis(imidazolyl)methane (bim), tris(pyrazolyl)toluidine (tpt) or tris(imidazolyl)methanol (tim) were investigated as catalysts for the hydroalkoxylation of alkynyl benzoic acids (5a–g). The regioselectivity of the reaction was shown to be highly dependent on the nature of the terminal alkyne substituent
铑(I)二羰基配合物1 - 4含螯合剂的N-供体配体双(吡唑基)甲烷(BPM),双(咪唑基)甲烷(BIM),三(吡唑基)甲苯胺(TPT)或三(咪唑基)甲醇(TIM)被研究为炔基苯甲酸(5a – g)的加氢烷氧基化的催化剂。已显示反应的区域选择性高度依赖于炔醇底物的末端炔基取代基(R)的性质。还确定了配合物3和4中存在第三个未配位的N供体基团会抑制这些配合物的催化效率,并且确定形成任一内环的反应的选择性(6)或外环(7)的氢烷氧基化产物受配合物4中存在的侧羟基的影响。我们使用13 C NMR光谱法来量化炔基苯甲酸CC键的极性,并讨论了将这种键极性测量值与反应的区域选择性相关联的努力。
Improvement of antibacterial activity of some sulfa drugs through linkage to certain phthalazin-1(2H)-one scaffolds
作者:Hany S. Ibrahim、Wagdy M. Eldehna、Hatem A. Abdel-Aziz、Mahmoud M. Elaasser、Marwa M. Abdel-Aziz
DOI:10.1016/j.ejmech.2014.08.016
日期:2014.10
phthalazine moiety. Similarly, our strategy in this research depends on the interconnection between some sulfa drugs and certain phthalazin-1(2H)-one scaffolds in an attempt to enhance their antibacterial activity. This approach was achieved through the combination of 4-substituted phthalazin-1(2H)-ones 9a, b or 14a, b with sulfanilamide 1a, sulfathiazole 1b or sulfadiazine 1c through amide linkers 6a