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Search results for: hydroboration

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... from D-galactal. Methylenation of the ester carbonyl followed by ring-closing metathesis returned 5. Hydroboration of the enol ether then delivered the C-glycoside 6 in high diastereomeric purity. ...
URL: http://www.organic-chemistry.org/Highlights/2005/21November.shtm
... homologated with ent-5. Hydroformylation followed by in situ acetal formation gave 11. Diastereroselective hydroboration followed by oxidation and esterification then led to 12. Aldol condensation of 12 ...
URL: http://www.organic-chemistry.org/Highlights/2006/06November.shtm
... effective tool for the enantioselective construction of heterocycles. Alcohol 20 was prepared by enantioselective hydroboration. Formation of the sulfonate ester 22 led directly to the Diels-Alder adduct 23 ...
URL: http://www.organic-chemistry.org/Highlights/2006/14August.shtm
... . The products such as 3 are useful building blocks for further coupling. Although hydroboration is well developed as a protocol for the anti-Markovnikov hydration of an alkene, ...
URL: http://www.organic-chemistry.org/Highlights/2006/27February.shtm
... Cis alkenyl cyclopropanes such as 14, readily available in high enantiomeric purity, undergo hydroboration with substantial diastereocontrol. Organometallic addition to the derived aldehyde 16 also proceeds with ...
URL: http://www.organic-chemistry.org/Highlights/2006/30JanuaryB.shtm
... achieved using the protocol developed by James L. Leighton of Columbia University. Diastereoselective hydroboration then led to 22. In another development, William R. Roush of ...
URL: http://www.organic-chemistry.org/Highlights/2006/31July.shtm
... conversion of the alkene precursor to 11 is stereochemically complementary to the results expected from hydroboration. Much progress has been reported on the specific homologation of terminal alkenes. ...
URL: http://www.organic-chemistry.org/Highlights/2007/10September.shtm
... METHODS/TOTAL SYNTHESES/VANCOMYCIN/BIOMIMETIC APPROACH/MACROCYCLIZATION/PEPTIDES Transition-metal promoted hydroborations of alkenes, emerging methodology for organic transformations. K. Burgess, M ...
URL: http://www.organic-chemistry.org/abstracts/authors/burgess-k.shtm
... ALLYLIC ESTERS/FORMIC-ACID/HYDROSILYLATION/REDUCTION/DERIVATIVES/FUNCTIONALIZATION/ALLENYLBORANES/HYDROBORATION/ALLYLSILANES T. Hayashi, in Studies in Natural Products Chemistry, Vol ...
URL: http://www.organic-chemistry.org/abstracts/authors/hayashi-t.shtm
... prepared from the stannyl aldehyde 4. Homologation gave the enyne 5, which on hydroboration and oxidation gave 6. Earlier, Professor Roush had optimized the crotylation of ...
URL: http://www.organic-chemistry.org/Highlights/2008/03November.shtm
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