Výsledky vyhledávání - "Ilona Raston"

On the effect of cyclodextrin on the Z/E-selectivity of Wittig Reactions with semistabilized ylides

Autor: Olof Wennerström, Ilona Raston, Gunnar Westman

Publikováno v: Tetrahedron. 49:483-488

The Z/E-selectivity of Wittig reactions between semistabilized ylids and aromatic aldehydes is affected by the addition of host molecules such as cyclodextrins (CD). An increase in the Z-selectivity from 57 to 92% has been reached with DMF as solvent

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::aeb62a9d1eb83072a1f40de2ab247369
https://doi.org/10.1016/s0040-4020(01)80315-x

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meso-tetra(meso-tetraphenylporphyrinyl)porphyrin, a macrocycle with five covalently linked porphyrin units

Autor: Weston Pimlott, Olof Wennerström, Harriet Ericsson, susanne Svensson, Ilona Raston

Publikováno v: Tetrahedron Letters. 30:1129-1132

A convenient synthesis of a meso-tetraphenylporphyrin monoaldehyde, 1c, is reported. Condensation of this aldehyde with excess benzaldehyde and pyrrole gives the bis-porphyrin 2. A low yield of the title compound, the penta-porphyrin 3 is obtained fr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b882854b0b35de1536eaac7eb1d27e90
https://doi.org/10.1016/s0040-4039(01)80378-6

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