Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Johannes Schörgenhumer"'
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 13, Iss 1, Pp 1753-1769 (2017)
Chiral phase-transfer catalysis is one of the major catalytic principles in asymmetric catalysis. A broad variety of different catalysts and their use for challenging applications have been reported over the last decades. Besides asymmetric C–C bon
Externí odkaz:
https://doaj.org/article/35b1840d53cc4af8a714772cb20eb123
Publikováno v:
Molecules, Vol 23, Iss 5, p 1142 (2018)
Detailed investigations concerning the organocatalytic (asymmetric) α-azidation of prochiral β-ketoesters were carried out. It was shown that the racemic version of such a reaction can either be carried out under oxidative conditions using TMSN3 as
Externí odkaz:
https://doaj.org/article/379f86f973cc4b3ba38e9933d83bb3cf
Publikováno v:
Helvetica Chimica Acta. 105
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::294080961f197ab6dd2a934975b713e2
https://doi.org/10.1002/hlca.202200110
https://doi.org/10.1002/hlca.202200110
Publikováno v:
Chemical Communications. 56:579-582
The highly enantioselective (>99.5% ee) synthesis of a new class of densely functionalized β2,2-amino acid derivatives by reacting isoxazolidin-5-ones with para-quinone methides in the presence of chiral ammonium salt phase-transfer catalysts was de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c16337f4d0abb3f3eeaa86dc89c1c382
https://doi.org/10.1039/c9cc09239k
https://doi.org/10.1039/c9cc09239k
Publikováno v:
Monatshefte für Chemie - Chemical Monthly. 150:789-794
A detailed screening of differently substituted chiral and achiral (thio)urea-containing quaternary ammonium salts revealed their potential as catalysts for the CO2-fixation with epoxides to obtain cyclic carbonates in high yields under operationally
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c076076ebc8d9f4c0d209da6caf1e55
https://doi.org/10.1007/s00706-019-02391-w
https://doi.org/10.1007/s00706-019-02391-w
Publikováno v:
Chemical Science
A chelation-assisted oxidative addition of gold(i) into the C–C bond of biphenylene is reported here. The presence of a coordinating group (pyridine, phosphine) in the biphenylene unit enabled the use of readily available gold(i) halide precursors
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ea4b6b9720476bb2a299bf9e97781f3b
https://www.zora.uzh.ch/id/eprint/228462/
https://www.zora.uzh.ch/id/eprint/228462/
Autor:
Johannes Schörgenhumer, Xiaofeng Wei, Estíbaliz Merino, Cristina Nevado, Sergio Cuesta-Galisteo
Publikováno v:
Angewandte Chemie International Edition
A nickel-catalyzed asymmetric reductive hydroarylation of vinyl amides to produce enantioenriched α-arylbenzamides is reported. The use of a chiral bisimidazoline (BIm) ligand, in combination with diethoxymethylsilane and aryl halides, enables the r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0cc31497afdfc1d75488c44ab20367ee
Publikováno v:
European Journal of Organic Chemistry
We herein report an unprecedented strategy for the asymmetric α‐chlorination of β‐keto esters with hypervalent iodine‐based Cl‐transfer reagents using simple Cinchona alkaloid catalysts. Our investigations support an α‐chlorination mecha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eeb90dadae1b31554d53688d6fc29f13
https://pubmed.ncbi.nlm.nih.gov/33519300
https://pubmed.ncbi.nlm.nih.gov/33519300
Publikováno v:
Chemical communications (Cambridge, England). 56(4)
The highly enantioselective (>99.5% ee) synthesis of a new class of densely functionalized β(2,2)-amino acid derivatives by reacting isoxazolidin-5-ones with para-quinone methides in the presence of chiral ammonium salt phase-transfer catalysts was
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::226fd768e70b1b0f4a62592319acb0f1
https://pubmed.ncbi.nlm.nih.gov/31830176
https://pubmed.ncbi.nlm.nih.gov/31830176
Autor:
Mario Waser, Yang Fan, Steven R. Kass, Maximilian Tiffner, Raphaël Robiette, Johannes Schörgenhumer
Publikováno v:
The Journal of Organic Chemistry, Vol. 83, no.17, p. 9991-10000 (2018)
Cycloadditions of epoxides with CO2 to synthesize cyclic five-membered ring organic carbonates are of broad interest from a synthetic, environmental, and green chemistry perspective, and the development of effective catalysts for these transformation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c94d02a2c03b81ce8128abe5db1f3b19
https://doi.org/10.1021/acs.joc.8b01374
https://doi.org/10.1021/acs.joc.8b01374