Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Helga Krause"'
Publikováno v:
Organometallics. 37:729-739
The complexes [(dippp)Fe(C2H4)2] (2) and [CpFe(C2H4)2][Li·(tmeda)] (5) both contain a formally zerovalent iron center but exhibit markedly different catalytic properties. Whereas 5 is able to induce a broad range of cycloisomerization and cycloaddit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ff4b9f3496439b0d3923fcb2ecda587c
https://doi.org/10.1021/acs.organomet.7b00571
https://doi.org/10.1021/acs.organomet.7b00571
Publikováno v:
Advanced Synthesis & Catalysis. 358:2398-2403
1-Alkynylcyclopropyl tosylates react with alkylmagnesium halides in the presence of catalytic ferric acetylacetonate [Fe(acac)3] under net propargylic substitution; allene formation, which is the prevalent reactivity mode of propargylic substrates ot
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eeff2d25e31b32a77ff684c715d562a7
https://doi.org/10.1002/adsc.201600357
https://doi.org/10.1002/adsc.201600357
Publikováno v:
Advanced Synthesis & Catalysis. 356:1281-1291
Although iron-catalyzed cross-coupling reactions of arylmagnesium halides with alkyl halides are well established and proceed effectively under a variety of experimental conditions, they often find limitations when working with sterically hindered ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c398e279037a6b23368a9c0155cba843
https://doi.org/10.1002/adsc.201301089
https://doi.org/10.1002/adsc.201301089
Publikováno v:
ChemInform. 47
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2af59323c41de17c18075221e8cb894a
https://doi.org/10.1002/chin.201651070
https://doi.org/10.1002/chin.201651070
Autor:
Ruben Martin, Günter Seidel, Richard Goddard, Helga Krause, Alois Fürstner, Christian W. Lehmann
Publikováno v:
Journal of the American Chemical Society. 130:8773-8787
A series of unprecedented organoiron complexes of the formal oxidation states -2, 0, +1, +2, and +3 is presented, which are largely devoid of stabilizing ligands and, in part, also electronically unsaturated (14-, 16-, 17- and 18-electron counts). Sp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4740a8a5d27531f7037a1386b20667d1
https://doi.org/10.1021/ja801466t
https://doi.org/10.1021/ja801466t
Publikováno v:
Tetrahedron. 58:6373-6380
Palladium catalyzed Suzuki- and Negishi cross coupling reactions are used to convert the now readily available 3,4-dibromopyrrole derivatives 13 and 26 into the core structures of different pyrrole alkaloids. Several compounds of this series exhibit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e9a802f02a6054a754a13aa9057c7e76
https://doi.org/10.1016/s0040-4020(02)00637-3
https://doi.org/10.1016/s0040-4020(02)00637-3
Publikováno v:
Angewandte Chemie (International ed. in English). 54(5)
The alkylation of complexes 2 and 7 with Grignard reagents containing β-hydrogen atoms is a process of considerable relevance for the understanding of C-H activation as well as C-C bond formation mediated by low-valent iron species. Specifically, re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b3d887e7ef8d1db8a7df268c3f01fb1
https://pubmed.ncbi.nlm.nih.gov/25504935
https://pubmed.ncbi.nlm.nih.gov/25504935
Publikováno v:
ChemInform. 45
The use of an iron phosphine complex as catalyst renders possible the cross-coupling of sterically hindered arylmagnesium halides with primary alkyl halides and tosylates.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cb36c782c351253bbcb14cf1555f5ed6
https://doi.org/10.1002/chin.201439058
https://doi.org/10.1002/chin.201439058
Autor:
Alois Fürstner, Helga Krause
Publikováno v:
Advanced Synthesis & Catalysis. 343:343-350
The arylation or alkenylation of aldehydes with boronic acids is conveniently effected by a catalyst system comprising RhCl3⋅3 H2O (1 mol %), the sterically hindered imidazolium salt 2 (1 mol %), and a base. The N-heterocyclic carbene 6 derived fro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::21cd11cd1aeb78b77bafdea47a50b96e
https://doi.org/10.1002/1615-4169(20010430)343:4<343::aid-adsc343>3.0.co
https://doi.org/10.1002/1615-4169(20010430)343:4<343::aid-adsc343>3.0.co
Publikováno v:
Bone Marrow Transplantation. 19:1111-1116
Thirty patients undergoing allogeneic BMT were screened post-transplant together with their marrow donors for CMV-specific T cell proliferation and the occurrence of CMV disease. Twenty-one of these patients received a marrow transplant from an HLA-m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2d635928448cf2b4bd93463fc173ed9d
https://doi.org/10.1038/sj.bmt.1700801
https://doi.org/10.1038/sj.bmt.1700801