Ring-strain effects on the efficiencies and deuterium effects on the efficiencies and regioselectivities of the di-π-methane rearrangement of bicyclic systems
作者:Helfried Hemetsberger、Frank Nispel
DOI:10.1016/s0040-4020(01)90518-6
日期:1990.1
synthesized and irradiated under sensitized conditions. The compounds 12 - 15 yielded di-π-methanerearrangement products. 16 was not reactive. The quantum yields for product formation were measured. They increase with ring strain of the bicyclic systems. A kinetic isotope effect on the regiospecifity of the rearrangement was observed in all cases. In addition, an isotope effect on the quantum yields of
Bridged aromatic alkenes for the study of carbocation–π interaction
作者:Thomas A. Spencer、Janeta Popovici-Müller、Bobbijo van Beusichem、Celeste Viscardi MacMillan、Carolee F. Lavey、Jessica M. Sin、Robert Ditchfield
DOI:10.1016/j.tet.2010.04.029
日期:2010.6
Toward the goal of gaining further insight into carbocation-pi interactions, bridged-ring aromatic alkene model systems are being investigated in which one isomer will permit pi complexation of an intramolecular tertiary carbocation with a benzene ring, but the other isomer will not. The syntheses of three sets of such isomers, having, respectively, benzobicyclo[3.21]octene, benzobicyclo[2.2.1]heptene, and benzobicyclo[4.2.1]nonene structures, are described. (C) 2010 Elsevier Ltd. All rights reserved.
HEMETSBERGER, HELFRIED;NISPEL, FRANK, TETRAHEDRON., 46,(1990) N1, C. 3823-3840
作者:HEMETSBERGER, HELFRIED、NISPEL, FRANK
DOI:——
日期:——
Lombardo,L. et al., Australian Journal of Chemistry, 1978, vol. 31, p. 1585 - 1605