Results 21 to 30 of about 10,026 (250)
Synthesis of 2H-1-Benzopyrans via Palladacycles with a Metal-Bonded Stereogenic Carbon
, 2016 Stable oxapalladacycles have been prepared and converted into a series of highly functionalized 2H-1-benzopyrans via regioselective insertion of activated ...
Janelle L. Portscheller (2691865) +1 more
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Secondary Metabolite Production by the Basidiomycete, , under Different Culture Conditions
Natural Product Communications, 2012 The basidiomycete Lentinus strigellus was cultivated in three different culture media and the secondary metabolites produced under different culture conditions were isolated and identified. When cultivated in a liquid medium with peptone, L.
Bartholomeu A. Barros-Filho +4 more
doaj +1 more source
One-Pot Pyrrolidine-Catalyzed Synthesis of Benzopyrans, Benzothiopyranes, and Dihydroquinolidines
CHIMIA, 2007 A simple catalytic racemic synthesis of benzopyranes, benzothiopyranes and 1,2-dihydroquinolines is presented. The organocatalytic domino reactions between 2-heteroatom substituted aldehyde derivatives and ?,?-unsaturated aldehydes or ...
Ismail Ibrahem +4 more
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BMC Chemistry, 2021 Background The nano-sized particles enhance the exposed surface area of the active part of the catalyst, thereby increasing the contact between precursors and catalyst considerably. In this study, nano-SiO2/1,5-diazabicyclo[4.3.0]non-5-en was synthesized,
Maryam Mehravar +3 more
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Foods, 2023 China Xihu Longjing tea is famous for its good flavor and quality. However, information on its related metabolites, except for flavonoids, is largely deficient. Different processing methods for China Xihu Longjing tea fixing—by machines at both the first
Hongchun Cui +6 more
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, 2018 A novel and efficient asymmetric synthesis of 2,4-diaryl-1-benzopyrans via enantioselective decarboxylative alkylation of β-keto acids to o-QM intermediates, followed by sequential cyclization and dehydration, has been developed. The synthetically useful
Dae Young Kim (1734676) +1 more
core +1 more source
Metal triflates catalyzed efficient synthesis of 3,4-dihydro-2H-1-benzopyrans [PDF]
, 2002 Ytterbium triflate efficiently catalyzes an unusual cyclization of o-hydroxybenzaldehydes with 2,3-dihydrofuran and 3,4-dihydro-2H-pyran in the presence of trimethyl orthoformate at ambient temperature to afford a new class of compounds, furo- and pyrano[
Kunwar, Ajit C. +6 more
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MoleculesThe antioxidant properties of novel diiodo-substituted 3-dithiocarbamic flavanones were investigated. The three frameworks that proved to be the most active ones in our previous studies were selected.
Mihail Lucian Birsa +1 more
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Nature Communications, 2018 Estrogen receptor alpha (ERα) plays critical roles in the etiology and treatment of breast cancer. Here the authors synthesize benzopyrans with variable side chains to identify antiestrogenic compounds and characterize OP-1074, a compound that exhibits ...
S. W. Fanning +9 more
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Amberlyst 15 Catalyzed Prenylation of Phenols: One-Step Synthesis of Benzopyrans
Molecules, 1997 A convenient one-step synthesis of 2,2-dimethylchromans and chromenes using Amberlyst 15 as a catalyst is described.
A. Banerji, A. Jain, G. P. Kalena
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