Zobrazeno 1 - 10
of 264
pro vyhledávání: '"L. Toke"'
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Publikováno v:
Tetrahedron. 57:1129-1137
The 1,3-dipolar cycloadditions of various azomethine ylides to 2-oxoindolin-3-ylidene derivatives have been investigated. The structure and stereochemistry of cycloadducts were studied in detail by NMR spectroscopic methods.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0b2af12179bce80d3f5cd60c79869afb
https://doi.org/10.1016/s0040-4020(00)01085-1
https://doi.org/10.1016/s0040-4020(00)01085-1
Publikováno v:
Synthetic Communications. 30:4221-4231
The electronpoor double-bond of cyclic vinylphosphine oxides (1, 3 and 4) is easily reduced by borane in a selective manner to give the corresponding saturated derivatives (2, 4 and 5, respectively) Under forcing conditions, change of the functionali
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eebd756e7d21224ab8e5e0bb679aef12
https://doi.org/10.1080/00397910008087043
https://doi.org/10.1080/00397910008087043
Publikováno v:
Journal of Inclusion Phenomena and Macrocyclic Chemistry. 38:435-443
Azacrown ethers with phosphonoalkyl-and phosphinoylalkyl side chains of two to five carbonatoms (2–4, 7 and 5–6, 8,respectively) were synthesized in acceptable yields.The cation binding ability of the new lariat etherswas evaluated by the picrate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79a61a47380e80b970540f0b9dfc15d4
https://doi.org/10.1023/a:1008121328326
https://doi.org/10.1023/a:1008121328326
Autor:
Krisztina Ludányi, L. Toke, Tibor Novák, Klára Tóth, Péter Bakó, Kálmán Újszászy, György Keglevich
Publikováno v:
Journal of Inclusion Phenomena and Macrocyclic Chemistry. 34:299-309
The synthesis of azacrown ethers with phosphonoalkyl side chains of two to five carbon atoms ( 3–8, 10), potentially useful as a new type of cation binding agent, is described. Introduction of the phosphonoalkyl moiety into the parent monoaza-15-cr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c2c0b631ba9cfa203ee177ff23675543
https://doi.org/10.1023/a:1008088112286
https://doi.org/10.1023/a:1008088112286
Publikováno v:
Thermochimica Acta. 319:87-95
Solid samples prepared from benzo-15-crown-5, its nitro, acetylamino and decanoylamino derivatives (Group I), and chloro-dibenzo-aza-crown ethers (Group II) with alkali metal salts were studied. The existence of solid adducts between LiBr, NaSCN, KSC
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e526c0950a45eac2a45d5b73d83d69f
https://doi.org/10.1016/s0040-6031(98)00388-8
https://doi.org/10.1016/s0040-6031(98)00388-8
Publikováno v:
Tetrahedron. 54:11597-11602
( E )-1-benzyloxy-2,3-epoxyalkanes ( 4 ) underwent stereoselective rearrangement in the presence of LIDAKOR reagent and large excess of butyllithium producing ( Z )-alkendiols (7) at ambident temperature. The same reaction serves anti oxetanes (6) at
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fd2c040e8520f5ad6f71f45ba48b4176
https://doi.org/10.1016/s0040-4020(98)00684-x
https://doi.org/10.1016/s0040-4020(98)00684-x
Publikováno v:
Tetrahedron: Asymmetry. 9:2293-2299
The isomerization of alkoxy oxiranes with chiral lithium amides has been carefully investigated with the aim of finding an enantioselective approach to hydroxy enolethers, a class of compounds which can be used for further synthetic elaborations.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d23597020704ae3fbd3a8d91c35c0409
https://doi.org/10.1016/s0957-4166(98)00239-0
https://doi.org/10.1016/s0957-4166(98)00239-0
Publikováno v:
Tetrahedron. 54:213-222
Crown ethers anellated to glucose units have been used to catalyse the enantioselective Michael addition of methyl phenylacetate to methyl acrylate in high chemical yields in up to 84% enantiomeric excess. A novel CH-acid deracemization has also been
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9205f72ebfe2841dfcc5e98ac872db4d
https://doi.org/10.1016/s0040-4020(97)10271-x
https://doi.org/10.1016/s0040-4020(97)10271-x
Publikováno v:
Scopus-Elsevier
A new annelation sequence was developed for the bicyclic diones2, intermediates in the total synthesis of strigol (1) and its analogues. The first step of the sequence is the conjugate addition of nitro alcohols4 to cyclopentenone5, followed by an al
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::312dfebe5370add3795ae47e2373f463
https://doi.org/10.1007/bf00807028
https://doi.org/10.1007/bf00807028