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Search results for: epoxidation
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... 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 ...
... . Key Words: asymmetric catalysis; chiral auxiliaries; synthetic methods; CATALYTIC ASYMMETRIC EPOXIDATION; PHASE-TRANSFER CATALYSIS; BAYLIS-HILLMAN REACTION; ALPHA-AMINO-ACIDS; QUATERNARY AMMONIUM SALT; DIELS-ALDER ...
... 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 ...
... 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 ...
... 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 ...
... 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 ...
... 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 ...
... 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 ...
... product silanes are easily oxidized to the corresponding alcohols. Another alternative to hydroboration is epoxidation followed by selective reduction of the more substituted end of the epoxide. Juan ...
... ; inhibitor; isostere; synthesis; ALPHA-AMINO ALDEHYDES; HYDROXYETHYLENE DIPEPTIDE ISOSTERES; DIASTEREOSELECTIVE SYN-EPOXIDATION; PROTEINASE-INHIBITOR RO-31-8959; IMMUNODEFICIENCY-VIRUS PROTEASE; ORALLY BIOAVAILABLE INHIBITOR; LARGE-SCALE SYNTHESIS; ...
