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Search results for: epoxidation

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... Douglass Taber University of Delaware Enantioselective ?-Functionalization of Carbonyl Compounds The enantioselective oxygenation procedures, epoxidation and dihydroxylation, developed by Barry Sharpless have dominated single-enantiomer organic synthesis. Recently ...
URL: http://www.organic-chemistry.org/Highlights/2005/28February.shtm
... was required to correct the secondary alcohol center. The final challenge was the selective epoxidation of the triene 12. There are two concerns: facial selectivity, and ...
URL: http://www.organic-chemistry.org/Highlights/2006/04December.shtm
... substituted allyl donors, based on alkenyl addition to 10, prepared by Sharpless asymmetric epoxidation. The ee of 12 is the same as the ee of 10. ...
URL: http://www.organic-chemistry.org/Highlights/2006/17July.shtm
... 2006, 45, 2096.) a cascade of enantioselective alcohol oxidation, hydroxy-directed epoxidation by the residual, enantiomerically-enriched alcohol, and finally acid-mediated cyclization, to convert ...
URL: http://www.organic-chemistry.org/Highlights/2006/20November.shtm
... organometallic reagents in stereocontrolled organic synthesis. The starting material 20 was prepared by Sharpless epoxidation. Acetylide opening was highly regioselective, to give 21. After protecting group ...
URL: http://www.organic-chemistry.org/Highlights/2006/30JanuaryB.shtm
... 2006 Douglass Taber University of Delaware Enantioselective Construction of Arrays of Stereogenic Centers Sharpless asymmetric epoxidation has long been a workhorse of enantioselective synthesis. The SAE protocol, however ...
URL: http://www.organic-chemistry.org/Highlights/2006/31July.shtm
... the outside face of the ketone derived from 13 delivered 14 with high diastereocontrol. Epoxidation of 14, again from the outside face, led directly to vigulariol 3 ...
URL: http://www.organic-chemistry.org/Highlights/2007/03December.shtm
... steps from commericially-available geranyl bromide, with the absolute configuration being set by Sharpless asymmetric epoxidation. Subsequent to the alkylation of 11 with the bromide 10, the now-surplus ...
URL: http://www.organic-chemistry.org/Highlights/2007/05November.shtm
... 2. The stereocontrolled preparation of 1, a considerable challenge, started with the epoxidation of the diene 4 to give 6. Although racemic 6 was used for ...
URL: http://www.organic-chemistry.org/Highlights/2007/07May.shtm
... reaction works both intermolecularly (illustrated, 6 7) and intramolecularly. The catalytic epoxidation of a terminal alkene with high ee has been a long-sought goal. Giorgio ...
URL: http://www.organic-chemistry.org/Highlights/2007/10September.shtm
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