Results 271 to 280 of about 67,475 (292)
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Epoxidation of 4-Alkylidenecyclopentenones
Synlett, 2006AbstractChemInform 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.
Ahmar, Mohammed +2 more
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Tetrahedron, 1964
Abstract New preparative routes to the 13α,17aα-epoxide (II) and the 13β,17aβ-epoxide (III) are described. Boron trifluoride in benzene converts the α-epoxide (II) into a mixture from which five products were isolated, but the β-epoxide (III) gives only the 17aβ-hydroxy-Δ8(14)-olefin (VIII).
J.M. Coxon, M.P. Hartshorn, D.N. Kirk
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Abstract New preparative routes to the 13α,17aα-epoxide (II) and the 13β,17aβ-epoxide (III) are described. Boron trifluoride in benzene converts the α-epoxide (II) into a mixture from which five products were isolated, but the β-epoxide (III) gives only the 17aβ-hydroxy-Δ8(14)-olefin (VIII).
J.M. Coxon, M.P. Hartshorn, D.N. Kirk
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Epoxidation of homoisoflavones
Journal of Heterocyclic Chemistry, 2003AbstractA comparative study of the epoxidation of homoisoflavones (3‐benzyl‐4‐chromones) 1–4 has been performed by various oxidizing agents, víz. Epoxidation with isolated dimethyldioxirane (Method A), with alkaline hydrogen peroxide (Method B), and with sodium hypochlorite (Method C) to obtain the epoxides 4–8.
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The interaction of cytosolic epoxide hydrolase with chiral epoxides
International Journal of Biochemistry, 19931. The kinetic parameters of the cytosolic epoxide hydrolase were examined with two sets of spectrophotometric substrates. The (2S,3S)- and (2R,3R)-enantiomers of 4-nitrophenyl trans-2,3-epoxy-3-phenylpropyl carbonate had a KM of 33 and 68 microns and a Vmax of 16 and 27 mumol/min/mg, respectively.
E C, Dietze, E, Kuwano, B D, Hammock
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Archives of Pharmacal Research, 1982
Conversion of vinylogous glycidic ester1 to2 by a stereoselective acyclic allylic epoxidation will be ...
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Conversion of vinylogous glycidic ester1 to2 by a stereoselective acyclic allylic epoxidation will be ...
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Inhibition of liver microsomal epoxide hydrase by cyproheptadine epoxide
Experientia, 1977Cyproheptadine epoxide is a competitive inhibitor or rat liver microsomal epoxide hydrase with an apparent K1-value of 0.75 mM. Cyclobenzaprine and its epoxide stimulate in vitro the activity of this enzyme, whereas cyproheptadine, carbamazepine and carbamazepine epoxide have no effect.
J, Pachecka +5 more
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Flavanoid epoxides V. Stereochemistry of flavindogenide epoxides
Tetrahedron Letters, 1968Abstract The four possible isomeric flavindogenide (3-arylideneflavanone) epoxides (type III, IV, V and VI) have been synthesized and their configurations assigned on the basis of chemical and spectroscopic data. Suggested mechanisms for the epoxidation reactions are discussed.
J.P. Doherty +6 more
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Nature, 1949
EPOXIDES occur among the products of the autoxidation of unsaturated fatty acids1 and drying oils2, and it has been suggested that they may be formed as intermediates in certain biological oxidations. Their accurate estimation is therefore a matter of considerable importance.
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EPOXIDES occur among the products of the autoxidation of unsaturated fatty acids1 and drying oils2, and it has been suggested that they may be formed as intermediates in certain biological oxidations. Their accurate estimation is therefore a matter of considerable importance.
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ChemInform, 1991
Publisher Summary The method for asymmetric epoxidation of alicyclic alcohols is known as Sharpless. The success of this method initiated much research into other techniques of asymmetric oxidation of alkenes in general and this chapter considers the progress in the area for the last six years.
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Publisher Summary The method for asymmetric epoxidation of alicyclic alcohols is known as Sharpless. The success of this method initiated much research into other techniques of asymmetric oxidation of alkenes in general and this chapter considers the progress in the area for the last six years.
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Aziridines: epoxides’ ugly cousins?
Chem. Soc. Rev., 2002AbstractFor Abstract see ChemInform Abstract in Full Text.
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