Results 131 to 140 of about 433,597 (216)

Nucleophilic Addition of Amines to Ruthenium Carbenes: ortho‐(Alkynyloxy)benzylamine Cyclizations towards 1,3‐Benzoxazines [PDF]

Angewandte Chemie - International Edition, 2015
NOTICE: This is the peer reviewed version of the following article: González-Rodríguez, C., Suárez, J. R., Varela, J. A., Saá, C. (2015). Nucleophilic Addition of Amines to Ruthenium Carbenes: ortho‐(Alkynyloxy)benzylamine Cyclizations towards 1,3 ...
CARLOS Gonzalez-Rodriguez, Jesus A Varela, CARLOS Saa   +2 more
exaly   +3 more sources

Reagent-Controlled Divergent Synthesis of 2-Amino-1,3-Benzoxazines and 2-Amino-1,3-Benzothiazines.

Journal of Organic Chemistry, 2019
A reagent-controlled chemoselective process has been devised for the synthesis of 4H-1,3-benzoxazines and related biologically important heterocycles in high yields under mild conditions.
V. P. R. K. Putta, Nagaraju Vodnala, Raghuram Gujjarappa, Ujjawal Tyagi, Aakriti Garg, Sreya Gupta, P. P. Pujar, C. Malakar   +7 more
semanticscholar   +4 more sources

Access to Chiral Tetrahydroquinazolines/1,3-Benzoxazines via Iridium-Catalyzed Asymmetric [4 + 2] Cycloaddition.

Organic Letters, 2023
An iridium-catalyzed asymmetric [4 + 2] cycloaddition of 1,3,5-triazinanes with 2-(1-hydroxyallyl)anilines/2-(1-hydroxyallyl)phenols has been developed, providing a straightforward and efficient approach to a wide range of tetrahydroquinazolines in good ...
Shengbiao Tang, Zhangru Cheng, Peng Zhang, Y. Shao, Jiangtao Sun   +4 more
semanticscholar   +2 more sources

Synthesis of 1,3-benzoxazines Based on 2,4,4-trimethyl-7,2’,4’-trihydroxy Flavan: Antibacterial, Anti-inflammatory, Cyclooxygenase-2 Inhibition and Molecular Modelling Studies

Letters in Drug Design & Discovery, 2018
In the present study, the formation of 2, 4, 4-trimethyl-7,2’4’-trihydroxy flavan has been used as the key feature for the formation of new 1,3-benzoxazines.
I. Mohammed, Mahmood Ahmed, Rabia Ikram, M. Muddassar, M. Qadir, K. Awang   +5 more
semanticscholar   +3 more sources

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Synthesis of Substituted 1,3-Benzoxazines and Their Anticorrosion Activity

Russian Journal of General Chemistry
R. R. Safargalin, L. A. Dachaeva, A. A. Mukhamedzyanova, R. Gataullin   +3 more
semanticscholar   +2 more sources

Visible-light-catalyzed synthesis of 1,3-benzoxazines via formal [4 + 2] cycloaddition of oximes with o-hydroxybenzyl alcohols.

Organic and biomolecular chemistry, 2023
A formal [4 + 2] cycloaddition of oximes with o-hydroxybenzyl alcohols was developed to easily synthesize diverse 1,3-benzoxazine derivatives. This synthesis was achieved under visible light-based organocatalytic and TsOH conditions.
Zhenjie Qi, Zhenyu An, Bing-Bing Huang, Mingzhong Wu, Quan Wu, Dongfang Jiang   +5 more
semanticscholar   +1 more source

Design, Spectroscopic Studies, DFT Calculations and Evaluation of Biological Activity of Novel 1,3-Benzoxazines Encompassing Isoniazid

Polycyclic aromatic compounds (Print), 2021
It was planned to utilize isoniazid 1 and substituted salicylaldehydes 2a–f to synthesize some N'-[(E)-(substituted-2-hydroxyphenyl)methylidene]pyridine-4-carbohydrazides 3a–g.
Basavarajaiah Suliphuldevara Matada, N. Yernale, Mohammad Javeed   +2 more
semanticscholar   +1 more source

Synthesis and antimicrobial activity of new benzofuranyl-1,3-benzoxazines and 1,3-benzoxazin-2-ones

Journal of Heterocyclic Chemistry, 2006
AbstractChemInform 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.
Ravi K. Ujjinamatada, Raju S. Appala, Yankanagouda S. Agasimundin   +2 more
openaire   +1 more source

Synthesis of 4H-1,3-benzoxazin-4-onium salts and 4-H-1,3-benzoxazin-4-ones

Chemistry of Heterocyclic Compounds, 1975
Salicylamide and its substituted derivatives react with aliphatic carboxylic acid anhydrides and perchloric acid to give 4H-1,3-benzoxazin-4-onium salts. These same compounds were obtained by acidic cyclization of O- and N-acylsalicylamides. The synthesized salts are converted to 2-substituted 4H-1,3-benzoxazin-4-ones by the action of triethylamine and
Yu. I. Ryabukhin, G. N. Dorofeenko, V. V. Mezheritskii   +2 more
openaire   +1 more source