New Substituted 1,4-Benzoxazine Derivatives with Potential Intracellular Calcium Activity
摘要:
Substituted 1,4-benzoxazines bearing an amino side chain at the 2-position were prepared and were found to have a moderate activity on intracellular calcium. Of the compounds studied it was found that those which possess a homoveratrylamino moiety exhibited superior potency. The chain length and the nature of the amine (4-fluorophenylpiperazine, 4-fluorobenzhydryloxyethylamine, N-substituted homoveratrylamine) is discussed. The 4-benzyl-3,4-dihydro-2[3-[[2-(3,4-dimethoxyphenyl)ethyl]amino]propyl]-2H-1,4-benzoxazine (3c) is the most potent derivative of the series with a ratio of IC50 values against PE (phenylephrine) and K+ of 2.1. Under these test conditions a ratio near 1 indicates potential intracellular calcium activity while a ratio greater than 100 an action on extracellular calcium influx.
OMS-2/H<sub>2</sub>O<sub>2</sub>/Dimethyl Carbonate: An Environmentally-Friendly Heterogeneous Catalytic System for the Oxidative Synthesis of Benzoxazoles at Room Temperature
catalyst for the oxidativesynthesis of benzoxazoles in the gram-scale from phenolic imines at room temperature. H2O2 and biobased reagent dimethyl carbonate (DMC) were successfully employed as the environmentally friendly oxidant and solvent, respectively, in an OMS-2-catalysted redox reaction for the first time. Benzoxazoles could also be obtained from N-substituted 2-aminophenols via Cu(OH)x/OMS-2-catalyzed
锰八面体分子筛(OMS-2)被发现是一种高效且可回收的异构催化剂,用于在室温下以克为单位从酚亚胺氧化合成苯并恶唑。H 2 O 2和生物基试剂碳酸二甲酯(DMC)分别成功地首次在OMS-2催化的氧化还原反应中用作环境友好型氧化剂和溶剂。苯并恶唑还可以在高温下通过Cu(OH)x / OMS-2-催化的连续氧化转化反应从N-取代的2-氨基苯酚获得。
A novel synthesis of 1,2,5-benzoxathiazepines
作者:Mangat Rai、Baljit Kaur
DOI:10.1039/c39810000971
日期:——
1,2,5-Benzoxathiazepines have been synthesized through a novel rearrangement reaction of the unstable cycloadducts of sulphene (H2CSO2) with substituted N-benzylidene-2-hydroxyanilines.
通过将不稳定的亚砜环(H 2 C SO 2)的环加合物与取代的N-亚苄基-2-羟基苯胺进行新的重排反应,合成了1,2,5-苯并恶二氮杂卓类化合物。
Synthesis, characterization and luminescence study of dimethyl[2-(arylmethyleneimino)phenolato]gallium complexes. Crystal structure of dimethyl[3,4-dimethoxyphenylmethyleneiminophenolato]gallium
Three dimethylgallium complexes of type Me2GaL [L = 3,4-dimethoxyphenylmethyleneiminophenolato (1), 4-butoxylphenyl methyleneiminophenolato (2), 2-pyridylphenolato (3)] have been synthesized by the reaction of trimethylgallium with appropriate N-arylmethyleneiminophenol. The complexes obtained have been characterized by elemental analysis, H-1 NMR, FT-IR and mass spectroscopy, respectively. The solid structure of 1 has been determined by X-ray single crystal analysis. The gallium atom was bonded by an oxygen atom and coordinated by an imine nitrogen atom forming one five-membered ring. The stable dimmer was formed by the coordination of bridging oxygen atom of phenolate to another gallium atom. The photoluminescence of complexes 1-3 were studied. The maximum emission wavelengths of 1-3 are between 338 and 362 nm upon radiation by UV light. The Electroluminescent properties of diodes using 1-3 as emitters were measured. The blue/green electroluminescence has been observed. (C) 2007 Elsevier B.V. All rights reserved.
Rai, Mangat; Kaur, Baljit; Dhir, B. S., Journal of the Indian Chemical Society, 1982, vol. 59, # 3, p. 416 - 417
作者:Rai, Mangat、Kaur, Baljit、Dhir, B. S.
DOI:——
日期:——
Devi, G. Sobhana; Indrasenan, P., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1988, vol. 27, # 9, p. 809 - 811