Results 241 to 250 of about 207,671 (274)
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Substituted cyclic imides as potential anti-gout agents
Life Sciences, 1990N-substituted cyclic imides of phthalimide, 2,3-dihydrohalazine-1,4-dione, and diphenimide were shown to reduce the serum uric acid levels in normal and hyperuric mice at 20 mg/kg/day I.P. for 14 days. The agents were potent inhibitors of commercial xanthine dehydrogenase and xanthine oxidase enzyme activities with IC50 values from 10(-7) to 10(-8) M ...
I H, Hall +4 more
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Syntheses and antibacterial activity of phendioxy substituted cyclic enediynes
Bioorganic & Medicinal Chemistry Letters, 2007AbstractChemInform 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.
Mukesh Chandra, Joshi +2 more
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1993
In this paper we consider rewrite systems that describe the λ-calculus enriched with recursive and non-recursive local definitions by generalizing the lsexplicit substitutions’ used by Abadi, Cardelli, Curien, and Levy [1] to describe sharing in λ-terms.
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In this paper we consider rewrite systems that describe the λ-calculus enriched with recursive and non-recursive local definitions by generalizing the lsexplicit substitutions’ used by Abadi, Cardelli, Curien, and Levy [1] to describe sharing in λ-terms.
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New Types of Functionally Substituted Cyclic Phosphoranes
Phosphorus, Sulfur, and Silicon and the Related Elements, 1992Abstract Dialkoxymethyl- and α -carbonylphosphoni-tes are the key compounds for the synthesis of new types of functionally substituted cyclic phosphoranes.
Andrey A. Prishchenko +2 more
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Efficient Synthesis of Substituted Cyclic α-Aminophosphonates
Synthesis, 2009The addition of diethyl phosphite to cyclic imines bearing alkyl, aryl, or heteroaryl substituents at the α-position in diethyl ether at room temperature presents an efficient route to substituted cyclic α-aminophosphonates. The application of boron trifluoridediethyl ether complex as a catalyst significantly accelerates the reaction.
Irina Odinets +5 more
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Synthesis of trifluoromethyl-substituted cyclic compounds
Journal of Fluorine Chemistry, 1992Abstract Study of trifluoromethyl-substituted 5- and 6-membered cyclic compounds is worthwhile owing to the widespread presence of such rings in natural products. Moreover this fluorinated group can induce modified physical and biological properties.
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Asymmetric synthesis of 2-substituted cyclic amines
Tetrahedron Letters, 2014Cyanomethylenetributylphosphorane-mediated ring closure for the asymmetric synthesis of 2-substituted cyclic amines such as azetidines, pyrrolidines and a piperidine is reported. The desired stereochemistry at the 2-position was fixed using (S)-tert-butyl sulfinamide as a chiral auxiliary.
Amit A. Kudale +3 more
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Skeletal remodelling of α-substituted cyclic eneformamides to α-ketonyl cyclic amines
New Journal of Chemistry, 2020A modular dehomologation strategy, which skeletally remodels cyclic α-substituted eneformamides to one-carbon shorter α-ketonyl saturated cyclic amines is described.
Timothy K. Beng +3 more
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N-substituted cyclic esters of phosphoramidous acid
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 19521. It has been found that cyclic esters, of phosphorochloridous acid: react with aliphatic and aromatic amines, forming N-substituted cyclic esters of phosphoramidous acid. 2. The following compounds have been synthesized-and some of their properties have been studied. i.e. p.720 © 1953 Consultants Bureau.
Arbuzov A., Zoroastrova V.
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Conversion of Lactones into Substituted Cyclic Ethers
Chemistry Letters, 1989Abstract Lactone enolates were treated with N-phenyl triflimide in the presence of hexamethylphosphoric triamide to afford smoothly the corresponding enol triflates, which, on reaction with lithium dialkylcuprates, gave rise to alkylated cyclic ethers in good yields.
Kazunori Tsushima +2 more
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