Zobrazeno 1 - 10
of 52
pro vyhledávání: '"Taeboem Oh"'
Autor:
G. Patrick Meier, William G. Earley, Matthew J. Sharp, Taeboem Oh, Andrew Madin, Jon E. Jacobsen, Larry E. Overman, Christopher J. O’Donnell, David W. Old
Publikováno v:
Journal of the American Chemical Society. 127:18046-18053
A detailed examination of the use of aza-Cope rearrangement-Mannich cyclization sequences for assembling the azatricyclo[4.4.0.0(2,8)]decane core of gelsemine is described. Iminium ions and N-acyloxyiminium ions derived from endo-oriented 1-methoxy-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::58f04a2d069a1fa6b7d176fd97ec1af5
https://doi.org/10.1021/ja055710p
https://doi.org/10.1021/ja055710p
Autor:
Taeboem Oh, Matthew J. Sharp, Larry E. Overman, Christopher J. O’Donnell, David W. Old, Andrew Madin
Publikováno v:
Journal of the American Chemical Society. 127:18054-18065
Intramolecular Heck reactions of alpha,beta-unsaturated 2-haloanilides derived from azatricyclo[4.4.0.0(2,8)]decanone 5 efficiently install the congested spirooxindole functionality of gelsemine. Depending upon the Heck reaction conditions and the na
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a0b4cfc37d9d5f3aafe7deb2e22a6ee5
https://doi.org/10.1021/ja055711h
https://doi.org/10.1021/ja055711h
Autor:
Patricia Lopez, Taeboem Oh
Publikováno v:
Tetrahedron Letters. 41:2313-2317
Simultaneous coordination of thioamide by mercuric bidentate Lewis acids were investigated. In stoichiometric amounts of 1,8-naphthalenediylbis(mercuric trifluoroacetate) and dimethyl crotonthioamide simultaneous coordination of the two mercury sites
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::15b00fbc9ee0fc08cb4c73ae4152c76d
https://doi.org/10.1016/s0040-4039(00)00157-x
https://doi.org/10.1016/s0040-4039(00)00157-x
Autor:
Taeboem Oh, Yun Ming Lin
Publikováno v:
Tetrahedron Letters. 38:727-730
Aldimines derived from 3-indoleacetaldehyde and 3-indolecarboxaldehyde undergo Lewis acid catalyzed Diels-Alder reactions. We found that Zn(OTf)2 is an excellent promoter of hetero Diels-Alder reactions of imines with acidic α-hydrogens. Higher yiel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fcf147609e012cef99aa182cd8ce163b
https://doi.org/10.1016/s0040-4039(96)02416-1
https://doi.org/10.1016/s0040-4039(96)02416-1
Autor:
Taeboem Oh, Michael Reilly
Publikováno v:
Tetrahedron Letters. 36:221-224
Chiral Lewis acids derived from 1,8-Naphthalenediylbis(dichloroborane), a novel bidentate Lewis acid, have been found to be active catalysts for the asymmetric Diels-Alder reaction. Utilizing chiral ligands derived from amino acids, a range of enanti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0040d43cb85b05ecd74a8353fbe6b19e
https://doi.org/10.1016/0040-4039(94)02227-3
https://doi.org/10.1016/0040-4039(94)02227-3
Autor:
Michael Reilly, Taeboem Oh
Publikováno v:
Tetrahedron Letters. 36:217-220
We show evidence of simultaneous coordination of 2, 6-dimethylpyranone by 1, 8-naphthalenediylbis(dichloroborane) in solution.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cc8fd4ffa8ca8a6dec39b3f7131383a7
https://doi.org/10.1016/0040-4039(94)02226-2
https://doi.org/10.1016/0040-4039(94)02226-2
Autor:
Michael Reilly, Taeboem Oh
Publikováno v:
Tetrahedron Letters. 35:7209-7212
Chiral Lewis acids derived from 1,8-Naphthalenediylbis(dichloroborane), a novel bidentate Lewis acid, have been found to be active catalysts for the asymmetric Diels-Alder reaction. Utilizing chiral ligands derived from amino acids and diols, a range
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b9f8e84567be33889e3b2bd36b314e3c
https://doi.org/10.1016/0040-4039(94)85362-2
https://doi.org/10.1016/0040-4039(94)85362-2
Autor:
Taeboem Oh, Michael Rally
Publikováno v:
Organic Preparations and Procedures International. 26:129-158
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a022247e99c454a37fd9f34d3a60a353
https://doi.org/10.1080/00304949409458024
https://doi.org/10.1080/00304949409458024
Publikováno v:
Tetrahedron Letters. 34:5827-5830
Imino dienophiles derived from amino ethers, amino alcohols and amino esters undergo Lewis acid promoted cycloaddition with Danishefsky's diene. Cyclic chelation between the imine and oxygen atom increases the stereoselectivity of the reaction.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cb9adc98bfd10cb6c825bdd5739f5a4e
https://doi.org/10.1016/s0040-4039(00)73790-7
https://doi.org/10.1016/s0040-4039(00)73790-7
Autor:
Taeboem Oh, Paul N. Devine
Publikováno v:
ChemInform. 22
We have shown that under proper conditions high stereoselectivities can be obtained in the Diels-Alder reactions of (triisopropylsiloxy)-1,3-cyclohexadiene with aldehydes, ketones, and ester dienophiles
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64c590c2cc0d9b77831f889df62d4a5d
https://doi.org/10.1002/chin.199130086
https://doi.org/10.1002/chin.199130086