Results 191 to 200 of about 12,444 (248)
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Advanced Synthesis & Catalysis
A general and efficient synthetic protocol was developed to synthesize highly functionalized 3‐furylmethyl chromones from enynones and o‐hydroxyphenyl enaminones via silver‐catalyzed cascade bis‐heteroannulation reaction.
Mingshuai Zhang +7 more
semanticscholar +1 more source
A general and efficient synthetic protocol was developed to synthesize highly functionalized 3‐furylmethyl chromones from enynones and o‐hydroxyphenyl enaminones via silver‐catalyzed cascade bis‐heteroannulation reaction.
Mingshuai Zhang +7 more
semanticscholar +1 more source
Journal of Organic Chemistry, 2019
The visible light induced C-H bond thiocyanation on the α-site of tertiary enaminones has been realized under metal-free, photocatalytic conditions in the presence of Rose Bengal, which enables the synthesis of thiocyanated alkene derivatives and ...
Yong Gao, Yunyun Liu, Jie‐Ping Wan
semanticscholar +1 more source
The visible light induced C-H bond thiocyanation on the α-site of tertiary enaminones has been realized under metal-free, photocatalytic conditions in the presence of Rose Bengal, which enables the synthesis of thiocyanated alkene derivatives and ...
Yong Gao, Yunyun Liu, Jie‐Ping Wan
semanticscholar +1 more source
Journal of Organic Chemistry, 2021
An efficient method for the synthesis of new indolizine-fused chromones has been accomplished from ethyl (E)-3-(2-acetylphenoxy)acrylates and pyridines in a "one-pot" manner.
Xiang-Jin Zhang +9 more
semanticscholar +1 more source
An efficient method for the synthesis of new indolizine-fused chromones has been accomplished from ethyl (E)-3-(2-acetylphenoxy)acrylates and pyridines in a "one-pot" manner.
Xiang-Jin Zhang +9 more
semanticscholar +1 more source
Journal of Organic Chemistry
Herein, we disclosed a highly efficient pathway toward 3-selenylated chromone derivatives via electrocatalytic cascade selenylation/cyclization/deamination of 2-hydroxyaryl enaminones with diselenides.
Kaili Cen +10 more
semanticscholar +1 more source
Herein, we disclosed a highly efficient pathway toward 3-selenylated chromone derivatives via electrocatalytic cascade selenylation/cyclization/deamination of 2-hydroxyaryl enaminones with diselenides.
Kaili Cen +10 more
semanticscholar +1 more source
Journal of Agricultural and Food Chemistry, 2020
Artocarpus heterophyllus (jack tree) is an evergreen fruit tree belonging to the genus Artocarpus (Moraceae), which is widely distributed in subtropical and tropical regions of Asia.
Yan-Hui Fu +7 more
semanticscholar +1 more source
Artocarpus heterophyllus (jack tree) is an evergreen fruit tree belonging to the genus Artocarpus (Moraceae), which is widely distributed in subtropical and tropical regions of Asia.
Yan-Hui Fu +7 more
semanticscholar +1 more source
Human health-related properties of chromones: an overview
Natural Product Research, 2020Natural compounds occurring throughout the world are scientifically and practically valuable because of their unique and beneficial properties to control a wide range of disorders in the human body.
Amirhossein Nazhand +6 more
semanticscholar +1 more source
Journal of Separation Science, 2021
Prim-O-glucosylcimifugin, cimifugin and 5-O-methylvisamminoside are three major chromone derivatives of Saposhnikovia divaricata that have many pharmacological activities, such as anti-inflammatory and antitumor activities.
Jiajia Sun +9 more
semanticscholar +1 more source
Prim-O-glucosylcimifugin, cimifugin and 5-O-methylvisamminoside are three major chromone derivatives of Saposhnikovia divaricata that have many pharmacological activities, such as anti-inflammatory and antitumor activities.
Jiajia Sun +9 more
semanticscholar +1 more source
Tetrahedron, 1965
Abstract A modified synthesis of the naturally occurring visnagin is reported. Starting from phloroglucin aldehyde, and building on the 2-methyl-γ-pyrone, 2-methyl-5,7-dihydroxy-6-formyl-chromone was obtained. Construction of the furan moiety was realized by a conventional method through the 7-carboxy-methoxy ether giving 5-norvisnagin which can be ...
M.M. Badawi, M.B.E. Fayez
openaire +1 more source
Abstract A modified synthesis of the naturally occurring visnagin is reported. Starting from phloroglucin aldehyde, and building on the 2-methyl-γ-pyrone, 2-methyl-5,7-dihydroxy-6-formyl-chromone was obtained. Construction of the furan moiety was realized by a conventional method through the 7-carboxy-methoxy ether giving 5-norvisnagin which can be ...
M.M. Badawi, M.B.E. Fayez
openaire +1 more source
Journal of Organic Chemistry, 2020
An efficient route for the coupling of maleimides with chromones at the C5-position has been developed under Ru(II) catalysis. It could provide 1,4-addition products and oxidative Heck-type products by switching additives.
Yan Zhou +11 more
semanticscholar +1 more source
An efficient route for the coupling of maleimides with chromones at the C5-position has been developed under Ru(II) catalysis. It could provide 1,4-addition products and oxidative Heck-type products by switching additives.
Yan Zhou +11 more
semanticscholar +1 more source
2014
The chromones are a class of chemical compounds characterised by the presence of the structure 5:6 benz-1:4-pyrone in their chemical make-up. The first chromone in clinical use, khellin, was extracted from the seeds of the plant Ammi visnaga, and had been used for centuries as a diuretic and as a smooth muscle relaxant.
openaire +2 more sources
The chromones are a class of chemical compounds characterised by the presence of the structure 5:6 benz-1:4-pyrone in their chemical make-up. The first chromone in clinical use, khellin, was extracted from the seeds of the plant Ammi visnaga, and had been used for centuries as a diuretic and as a smooth muscle relaxant.
openaire +2 more sources