Results 101 to 110 of about 360 (144)
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Chemischer Informationsdienst, 1982
AbstractDie Umsetzung des Chlorbenzoxazins (I) mit den o‐Aminophenolen (IIa), den o‐Phenylendiaminen (IIb) bzw. dem o‐Aminothiophenol (IIc) führt zu den 2‐Hydroxyphenyl‐ substituierten Azolen (III).
R. TACHIKAWA, K. WACHI, A. TERADA
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AbstractDie Umsetzung des Chlorbenzoxazins (I) mit den o‐Aminophenolen (IIa), den o‐Phenylendiaminen (IIb) bzw. dem o‐Aminothiophenol (IIc) führt zu den 2‐Hydroxyphenyl‐ substituierten Azolen (III).
R. TACHIKAWA, K. WACHI, A. TERADA
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Synthesis of 1,2,4-triazolo[5,1-b][1,3]benzoxazines
Chemistry of Heterocyclic Compounds, 2010Alkylation of 1H-azoles by salicyl alcohol to give 2-(1H-azolylmethyl)phenols has been studied in some detail [1-3]. In the presence of good leaving groups in the azole molecules a subsequent cyclization of the initially formed alkylation products can occur to give azolo[1,3]benzoxazines [4]. We propose a simple, one-stage method for the preparation of
V. A. Osyanin +2 more
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Synthesis of substituted salicylamines and dihydro-2H-1,3-benzoxazines
Tetrahedron, 2007Abstract Phenols were converted to their magnesium salts with the MgCl 2 –Et 3 N base system and subsequently reacted with Eschenmoser's salt, affording N , N -dimethyl substituted benzylamines in high to excellent yields. A series of mono N -substituted benzylamines were prepared in one-pot syntheses by ortho -formylation of phenols to ...
Hany F. Anwar +2 more
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A Novel Three-Component Reaction for the Synthesis of 1,3-Benzoxazines in Water
Combinatorial Chemistry & High Throughput Screening, 2013A simple and proficient method for the synthesis of 1,3-benzoxazine derivatives via three-component reaction of isocyanide and isoquinoline with 1-(6-hydroxy-2-isopropenyl-1-benzofuran-yl)-1-ethanone or 4-hydroxycumarine in water in the presence of piperidine at 70°C is reported.
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Synthesis of New 1,3‐Benzoxazines from Ketimines and Their Bioevaluation
Journal of Heterocyclic Chemistry, 2015A new series of 1,3‐Benzoxazines were synthesized from ketimines and triphosgene. The synthesized compounds were characterized by IR, 1HNMR, and mass spectral data. The synthesized compounds on bioevaluation indicated significant antifungal activity.
Vikas V. Borgaonkar, Bhagwan R. Patil
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Synthesis of novel heterocyclic system-imidazo[5,1-b][1,3]benzoxazine
Chemistry of Heterocyclic Compounds, 2006AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
V. A. Osyanin, N. E. Sidorina
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8-Acyloxy-1,3-benzoxazine-2,4-diones as Siderophore Components for Antibiotics
Arzneimittelforschung, 20118-Acyloxy-1,3-benzoxazine-2,4-diones as masked catechol derivatives represent a novel type of siderophore components, whose growth promoting activity is low or not existing if tested alone. But after conjugation with beta-lactam antibiotics the resulting conjugates show a significantly increased antibacterial activity against Gram-negative bacteria ...
S, Wittmann +4 more
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Studies in 1,3-Benzoxazines IV. Reaction of Imidoyl Chlorides of 1,3-Benzoxazines with Sulfoxides
HETEROCYCLES, 1981Ryuji Tachikawa +2 more
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1,3-benzoxazines and some of their reactions
Russian Journal of General Chemistry, 2016R. H. Bagautdinova +4 more
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