Experimental and quantum-mechanical investigation of the vinylsilane-iminium ion cyclizationElectronic supplementary information (ESI) available: experimental procedures, spectroscopic data and copies of 13C NMR spectra for compounds 4–16. Selected bond lengths in geometry optimized structures of α-substituted (Z)-vinylsilanes. Cartesian coordinates, raw energies and lower frequencies of computationally characterized species 17A–32H. See http://www.rsc.org/suppdata/ob/b2/b212333a/
作者:Lisbet Kværnø、Per-Ola Norrby、David Tanner
DOI:10.1039/b212333a
日期:2003.3.13
underlined the lack of reactivity of ketiminium species and also convincingly explained the observed diastereoselectivities of aldiminium species. The calculations further revealed that (Z)-vinylsilanes cyclize via a silicon-stabilized beta-carbocation, and that any formal aza-Cope rearrangement of the starting material to an allylsilane-iminium species does not take place in a concerted fashion. However