Results 161 to 170 of about 3,681 (218)

Benzopyran derivatives from Mallotus apelta

Phytochemistry, 2001
From the leaves of Mallotus apelta, seven benzopyran compounds were obtained and their structures were determined using spectroscopic methods. One showed moderate antibiotic activity against Micrococcus lutens.
T Y, An, L H, Hu, X F, Cheng, Z L, Chen
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Antimicrobial Benzopyrans from the Receptacle of Sunflower

Bioscience, Biotechnology, and Biochemistry, 1996
The antimicrobial substances in sunflower (Helianthus annuus) were investigated. Two antifungal benzopyran derivatives, 6-acetyl-2,2-dimethyl-1,2-benzopyran (1) and 6-acetyl-7-hydroxy-2,2-dimethyl-1,2-benzopyran (2), were isolated from the ethanol extract of sunflower receptacles.
A, Satoh, H, Utamura, M, Ishizuka, N, Endo, M, Tsuji, H, Nishimura   +5 more
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A New Efficient Synthesis of Spirocyclic Benzopyrans

Synthesis, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Gregoire Pave, Pierre Chalard, Marie‐Claude Viaud‐Massuard, Yves Troin, Gerald Guillaumet   +4 more
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A benzopyran derivative substituted at position 3

Acta Crystallographica Section C Crystal Structure Communications, 2002
In (E)-3-[[(diphenoxyphosphoryl)methylhydrazono]methyl]-4H-1-benzopyran-4-one, C(23)H(19)N(2)O(5)P, the benzopyran-methylhydrazone moiety is planar and the two phenoxy phenyl rings are inclined at angles of 21.29 (6) and 89.33 (5) degrees. Weak C[bond]H...O and C[bond]H...N intramolecular interactions exert some influence on the planarity and ...
Agnieszka J, Rybarczyk-Pirek, Magdalena, Małecka, Sławomir J, Grabowski S, Jolanta, Nawrot-Modranka   +3 more
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Benzopyrans as selective estrogen receptor β agonists (SERBAs). Part 4: Functionalization of the benzopyran A-ring

Bioorganic & Medicinal Chemistry Letters, 2007
Benzopyrans are selective estrogen receptor (ER) beta agonists (SERBAs), which bind the ER receptor subtypes alpha and beta in opposite orientations. We have used structure based drug design to show that this unique phenomena can be exploited via substitution at the 8-position of the benzopyran A-ring to disrupt binding to ERalpha, thus improving ...
Bryan H, Norman, Timothy I, Richardson, Jeffrey A, Dodge, Lance A, Pfeifer, Gregory L, Durst, Yong, Wang, Jim D, Durbin, Venkatesh, Krishnan, Sean R, Dinn, Shengquan, Liu, John E, Reilly, Kendal T, Ryter   +11 more
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Synthesis of benzopyran derivatives as PPARα and/or PPARγ activators

Bioorganic & Medicinal Chemistry, 2019
We describe the synthesis of 26 compounds, small polycerasoidol analogs, that are Lipinski's rule-of-five compliant. In order to confirm key structural features to activate PPARα and/or PPARγ, we have adopted structural modifications in the following parts: (i) the benzopyran core (hydrophobic nucleus) by benzopyran-4-one, dihydrobenzopyran or ...
Bermejo, Almudena, Barrachina, Isabel, El Aouad, Noureddine, Franck, Xavier, Chahboune, Nadia, Andreu, Inmaculada, Figadère, Bruno, Vila, Laura, Hennuyer, Nathalie, Staels, Bart, Dacquet, Catherine, Caignard, Daniel, Sanz, María-Jesús, Cortes, Diego, Cabedo, Nuria   +14 more
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Benzopyrans. Part 23. Nitrogen heterocycles fused with or linked to 1-benzopyran from 3-acyl-2-methyl-1-benzopyran-4-one

Journal of the Chemical Society, Perkin Transactions 1, 1988
The enamine (2), prepared from the title benzopyranone (1; R2= H, Me, and Ph) and dimethylformamide dimethyl acetal, on treatment with ammonia and hydroxylamine gives the fused pyridine (5) and pyridine 2-oxide (10), respectively. Hydrazine, phenylhydrazine, and guanidine undergo initial 1,6-addition to the enamine (2) ultimately giving the pyrazoles ...
Chandra Kanta Ghosh, Chandana Pal, Jharna Maiti, Manjusha Sarkar   +3 more
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2-Benzopyran-3-one

Journal of the Chemical Society, Chemical Communications, 1983
Trapping and low temperature matrix isolation experiments show that 2-benzopyran-3-one (1) is efficiently generated by thermolysis or photolysis of the bis-lactone (2); flash vacuum thermolysis of (2) yields isocoumarin (5) and photolysis of (2) in an argon matrix gives (1) and the ketene (6).
David A. Bleasdale, David W. Jones, G�nther Maier, Hans Peter Reisenauer   +3 more
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Benzopyrans. Part 44. Synthesis of 3‐(4‐Oxo‐4H‐1‐benzopyran‐2‐yl)indolizines.

ChemInform, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Chandra Kanta Ghosh, Sumit Kumar Karak, Amarendra Patra   +2 more
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Convenient Preparation of Pyrano Benzopyranes in Aqueous Media

Synthetic Communications, 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.
M. Kidwai, S. Saxena
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