72850-33-0Relevant academic research and scientific papers
Base-regulated tunable synthesis of pyridobenzoxazepinones and pyridobenzoxazines
Shen, Chaoren,Wu, Xiao-Feng
, p. 4433 - 4443 (2015/09/01)
A base-regulated one-pot protocol for the tunable synthesis of pyridobenzoxazepinones and pyridobenzoxazines has been developed. The preparation of pyridobenzoxazepinones is achieved in moderate to good yield by utilizing an aromatic nucleophilic substitution (SNAr, O-arylation)/carbonylation tandem reaction. Mechanistic studies suggest that SNAr (O-arylation) proceeds prior to the aminocarbonylation. Through the regulation of bases, pyridobenzoxazines can be obtained via successive SNAr (O-arylation and then N-arylation). Base is crucial for the regulation of the products.
An Improved Synthesis of Substituted Dibenzodioxines
Lee, Ho H.,Denny, William A.
, p. 1071 - 1074 (2007/10/02)
An improved general synthesis of substituted dibenzodioxines by reaction of catechol and substituted 1,2-dichloro- or 2-chloronitro-benzenes with metallic potassium in hexamethylphosphoramide is reported.The yields are generally superior to those in published methods, and in particular the reaction appears the one of choice for the synthesis of both the parent dibenzodioxine and the 1-carboxy derivative.
Synthesis of Some Heterocyclic Skeletons via Organoiron Complexes. Crystal and Molecular Structure of (5a,6,7,8,9,9a-η6-1,4-Benzoxathiinopyridine)(η5-cyclopentadienyl)iron Hexafluorophosphate
Sutherland, Ronald G.,Piorko, Adam,Lee, Choi Chuck,Simonsen, Stanley H.,Lynch, Vincent M.
, p. 1911 - 1916 (2007/10/02)
Synthesis of the heterocyclic skeletons of some biologically active compounds from (η6-dichlorobenzene)(η5-cyclopentadienyl)iron hexafluorophosphate in a two step procedure is described.Cyclopentadienyliron hexafluorophosphate complexes of 1,4-benzodioxinopyridine, 1,4-benzoxathiinopyridine, 10H-pyridobenzoxazine, benzonaphthodioxin, 4-methylbenzobenzopyran-2-onedioxin and benzoanthracen-9,10-dionodioxin were isolated and characterized.Upon pyrolytic sublimation of these complexes the free heterocycles were obtained and characterized. (η6-1,4-Benzoxathiinopyridine)(η5-cyclopentadienyl)iron hexafluorophosphate crystalizes in the orthorhombic system, space group Pbca; the dihedral angle between the planes of outerrings was found to be 176.6 (1).
New pyridobenzodioxin compounds and methods for their production
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, (2008/06/13)
Pyridobenzodioxin compounds, which are useful as pharmacological agents, especially as agents for the treatment of senility and reversal of amnesia, and methods for their preparation are disclosed. Pharmaceutical compositions containing said compounds and methods for using said compositions in treating senility and reversal of amnesia are also taught.
