Results 211 to 220 of about 12,444 (248)

Revolutionizing treatment for toxic shock syndrome with engineered super chromones to combat antibiotic-resistant Staphylococcus aureus.

European Review for Medical and Pharmacological Sciences, 2023
M. Naveed, N. Ain, T. Aziz, I. Ali, M. Aqib Shabbir, K. Javed, M. Alharbi, A. Alshammari, A. F. Alasmari   +8 more
semanticscholar   +1 more source

Thermoinduced Free-Radical C-H Acyloxylation of Tertiary Enaminones: Catalyst-Free Synthesis of Acyloxyl Chromones and Enaminones.

Organic Letters, 2018
In this paper, the direct acyloxylation of the α-C(sp2)-H bond in tertiary β-enaminones is accomplished under catalyst-free conditions and ambient temperature by using aroyl peroxides as coupling partners. By means of a thermoinduced free-radical pathway,
Yanhui Guo, Yunfeng Xiang, Li Wei, Jie‐Ping Wan   +3 more
semanticscholar   +1 more source

A Facile Enantioselective Alkynylation of Chromones.

Angewandte Chemie, 2019
The first catalytic enantioselective alkynylation of chromones is reported. In this process, chromones are silylated to form silyloxybenzopyrylium ions that lead to silyl enol ethers after Cu-catalyzed alkyne addition using StackPhos as a ligand.
Lindsey G. DeRatt, Mukesh Pappoppula, A. Aponick   +2 more
semanticscholar   +1 more source

On-Water Cp*Ir(III)-Catalyzed C-H Functionalization for the Synthesis of Chromones through Annulation of Salicylaldehydes with Diazo-Ketones.

Journal of Organic Chemistry, 2019
A high-valent Ir(III)-catalyzed C-H bond functionalization is carried out for the first time on water for the synthesis of a biologically relevant chromone moiety.
Suvankar Debbarma, Md Raja Sk, Biswabrata Modak, M. Maji   +3 more
semanticscholar   +1 more source

Chromones from Dictyoloma incanescens

Phytochemistry, 1987
Abstract Extraction of Dictyoloma incanescens bark gave 6-(3-methyl-but-2-enyl) allopteroxylin and 6-(3-methylbut-2-enyl) allopeteroxylin methyl ether, the structures of which were established by chemical transformations and spectroscopic means.
Angela Martha Campos, Duc Do Khac, Marcel Fetizon   +2 more
openaire   +1 more source

Natürlich vorkommende Chromone

1954
Die naturlichen, d. h. von Pflanzen aufgebauten Chromone, leiten sich vom γ-Benzopyron ab. Zum Unterschied von den im Pflanzenreich weitverbreiteten Flavonen und ihren im Pyronring hydrierten und oxydierten Abkommlingen, die am C(2) einen Arylrest tragen, besitzen die naturlichen Chromone an diesem Kohlenstoffatom eine Methyl- (in einem Fall eine ...
openaire   +1 more source

Chromones

Proceedings of the Indian Academy of Sciences - Section A, 1953
R. M. Naik, A. M. Mehta, V. M. Thakor, G. V. Jadhav, R. C. Shah   +4 more
openaire   +2 more sources

Copper-Mediated Cyclization of o-Hydroxyaryl Enaminones with 3-Indoleacetic Acids toward the Synthesis of 3-Indolmethyl-Chromones.

Journal of Organic Chemistry, 2022
Kangmei Wen, Yinyan Li, Qiwen Gao, Jiewen Chen, Jie Yang, Xiaodong Tang   +5 more
semanticscholar   +1 more source

Chromones

Proceedings of the Indian Academy of Sciences - Section A, 1949
V. V. Virkar, R. C. Shah
openaire   +2 more sources

Occurrence, synthesis and biological activity of 2-(2-phenyethyl)chromones.

European journal of medicinal chemistry, 2022
Meiyan Fan, Wei Yang, Min He, Yong-Jian Li, Zhiyun Peng, Guangcheng Wang   +5 more
semanticscholar   +1 more source