منابع مشابه
Laser Characteristics from a Chalcone in Solution
We have studied the laser spectra from conjugated chalcone in a few organic solutions. The laser of the chalcone appears to arise from its monomeric state. Chalcone in solutions of acetone or tetrahydrofuran (THF) was pumped by the third harmonics of an Nd: YAG (355 nm) for different concentrations and pump-pulse energies.
متن کاملTwo Different Chalcone Synthase Activities from Spinach
Chenopodiaceae, Spinacia oleracea, Flavonoid Metabolism, Chalcone Synthase, Two Different Activities Chalcone synthase activity was found in enzyme preparations from spinach. In homogenates o f young leaves two different activities o f the enzyme could be separated by DEAE-ion exchange chromatography and chromatofocusing. Both activities formed naringenin with [2-14C] malonylCoA and 4-coumaroyl...
متن کاملRegioselective multicomponent sequential synthesis of hydantoins.
The development of new practical and green methods for the synthesis of small heterocycles is an attractive area of research due to the well-known potential of heterocyclic small molecule scaffolds in the drug discovery process. Herein we report a one-pot, three-component sequential procedure for the synthesis of diversely 1,3,5- and 1,3,5,5-substituted hydantoins, in high yields and very mild ...
متن کاملThe Echanism of the Formation of Hydantoins
Demineralization of coals and coal-derived chars is part of an effort to developalternative fuels from coal. Pyrolysis and some gasification processes yieldchars containing a large fraction of the calorific value of the feed coal andessentially all of its mineral matter. In the work reported here, three gasifi-cation chars produced from anthracite, bituminous, and subbitumin...
متن کاملSynthesis of substituted hydantoins in low melting mixtures.
A novel domino synthesis of 1,3,5-trisubstituted hydantoin derivatives has been developed in low melting L-(+)-tartaric acid-DMU melt mixtures. The functionalized hydantoins are obtained in good yields from β,γ-unsaturated ketoacids and urea under environmentally benign and simple reaction conditions.
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ژورنال
عنوان ژورنال: Acta Chemica Scandinavica
سال: 1958
ISSN: 0904-213X
DOI: 10.3891/acta.chem.scand.12-1528