2005
DOI: 10.1016/j.tet.2005.07.039
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Iridium-catalyzed enantioselective cycloisomerization of nitrogen-bridged 1,6-enynes to 3-azabicylo[4.1.0]heptenes

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Cited by 90 publications
(58 citation statements)
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“…[113] After optimization of the reaction conditions, they proposed the use of a catalyst consisting of [{IrCl(cod)} 2 ], AgOTf, and Tol-binap. The importance of CO (1 atm) was once again observed; presumably CO acts as an excellent p-acceptor ligand in the catalyst.…”
Section: Enyne Rearrangementsmentioning
confidence: 99%
“…[113] After optimization of the reaction conditions, they proposed the use of a catalyst consisting of [{IrCl(cod)} 2 ], AgOTf, and Tol-binap. The importance of CO (1 atm) was once again observed; presumably CO acts as an excellent p-acceptor ligand in the catalyst.…”
Section: Enyne Rearrangementsmentioning
confidence: 99%
“…[113] Nach Optimierung der Reaktionsbedingungen schlugen sie ein Katalysatorsystem aus [{IrCl(cod)} 2 ], AgOTf und Tol-binap vor. Die Bedeutung von CO (1 atm) wurde wiederum bestätigt; vermutlich fungiert es im Katalysator als sehr guter p-Akzeptorligand.…”
Section: Enin-umlagerungenunclassified
“…In einem typischen Experiment wurde das Enin 338 mit PtCl 2 in Methanol unter Rückfluss erhitzt und ergab den carbocyclischen Ether 339 in 77 % Ausbeute [Gl. (113)]. Geminal disubstitutierte Alkene wie 340 verhielten sich anders: Hier wird in 80 % Ausbeute der sechsgliedrige Carbocyclus 341 durch die 6-endo-Addition der Alkeneinheit an die C-C-Dreifachbindung erhalten [Gl.…”
Section: Enin-umlagerungenunclassified
“…1). We selected Vaska's type iridium(I) complexes, which had previously been used by Shibata et al in a chiral ligand-based asymmetric cycloisomerization of N-tethered 1,6-enynes B (ee up to 78 %) [16]. Introduction of the chiral counterion occurred by simple treatment of Vaska's complex [IrCl(CO)(PPh 3 ) 2 ] with the corresponding silver salt 1.…”
Section: Enantioselective [Ir]-catalyzed 16-enyne Cycloisomerizationmentioning
confidence: 99%