Výsledky vyhledávání - "Mette Lene Falck-Pedersen"

Synthesis of spirane-bridged rigidified oxalkyl cyclopentadienyl ligands

Autor: Kjell Undheim, Mette Lene Falck-Pedersen

Publikováno v: Tetrahedron. 61:6829-6835

Methods for the preparation of constrained spirane-bridged oxalkyl indenyl ligands are described. The cis , cis -α,α′-spirane derivatives were synthesised in several steps from spiro[4.4]nonane-1,6-dione. Carbylation was achieved by Wittig methen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c6066262375ffa3e7fd0126e676444ee
https://doi.org/10.1016/j.tet.2005.04.075

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Synthesis of silacycloalkenes and silaspirenes by Ru(II)-catalyzed ring-closing metathesis reactions

Autor: Iftikhar Ahmad, Mette Lene Falck-Pedersen, Kjell Undheim

Publikováno v: Journal of Organometallic Chemistry. 625:160-172

Cyclisation reactions of dienyl- and enynylsilanes by carbon–carbon bond formation under RCM conditions yield five-, six- and seven-membered silacycloalkenes. The relative ease of ring formation from dienes was in the order six->seven->five-membere

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f438587629d1367963a600e1a7f3e73f
https://doi.org/10.1016/s0022-328x(00)00818-4

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THE PAUSON-KHAND REACTION IN SYNTHESIS OF BICYCLIC RIGID α-AMINO ACIDS

Autor: Christian Rømming, Jing Wang, Mette Lene Falck-Pedersen, Kjell Undheim

Publikováno v: Synthetic Communications. 31:1141-1148

The combination of intramolecular Pauson-Khand methodology for Co2(CO)8 mediated cyclization, and the Schollkopf chiral auxiliary for stereoselective preparation of appropriate 1,6-heptenynes constitutes a powerful method for the preparation of rigid

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6486cd685fae32028aaa26f7d1b71804
https://doi.org/10.1081/scc-100103996

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Stereoselectivity in the synthesis of conformationally constrained vicinally dihydroxylated cyclic α-amino acids

Autor: Christian Rømming, Jing Wang, Mette Lene Falck-Pedersen, Kjell Undheim, Kristin Hammer

Publikováno v: Journal of the Chemical Society, Perkin Transactions 1. :1691-1695

Stereoselective syntheses of precursors to vicinal cis-dihydroxy-1-aminocyclopentane- and -cyclohexane-carboxylic acid methyl esters and their methoxy analogues are described. The chiral products are isolated as pure enantiomers. The absolute configu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3fcfcce16883d563b213e0de5b79d0df
https://doi.org/10.1039/b001779p

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Palladium-mediated carbosubstitutions in spiranes

Autor: Christian Rømming, Mette Lene Falck-Pedersen, Kjell Undheim

Publikováno v: Tetrahedron. 55:8525-8538

Carbosubstitutions in spirene triflates can be effected by Pd-catalyzed couplings with stannylated or zincated arenes. Differential carbosubstitution resulted from stepwise triflation and coupling in spiro[4,4]-nonane-1,6-dione. Catalytic hydrogenati

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f28ad3cf99399a469c8ea0c774bce4d4
https://doi.org/10.1016/s0040-4020(99)00470-6

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Palladium mediated substitutions and rearrangements in spiro[4,4]nonanes

Autor: Kjell Undheim, Doina Sirbu, Mette Lene Falck-Pedersen, Christian Rømming

Publikováno v: Tetrahedron. 55:6703-6712

The two-step NaBH 4 CeCl 3 1,2-reduction of spiro[4,4]nonane-2,7-diene-1,6-dione gave a rans-alcohol as a first product which reacted further to the corresponding cis,trans-diol. Pd(II)-catalysis was used to effect an allylic rearrangement from the 1

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c7aca261434d78aeff3c021c7df67066
https://doi.org/10.1016/s0040-4020(99)00316-6

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