Nucleophilic Substitution Induced by Electron Transfer at the Bridgehead of Polycyclic Alkanes: Competition between Polar and Radical Pathways
作者:William Adcock、Christopher I. Clark、Neil A. Trout
DOI:10.1021/jo001638w
日期:2001.5.1
triptycenes react predominantly by a polar mechanism initiated by the formation of a carbanion. In the case of the halo ketones (6, Y = O, X = Br and I), a mechanistic divergence of the reaction was unexpectedly encountered. Whereas the bromo ketone provides the substitution product (6, Y = O, X = SnMe(3)) in good yield (ca. 75%), apparently by a radicalpathway, the iodo ketone yields a fragmentation
Stereochemistry of metal anion substitutions on carbon
作者:G. S. Koermer、M. L. Hall、T. G. Traylor
DOI:10.1021/ja00775a086
日期:1972.10
Estimation of electron-transfer contributions in reactions of alkyl bromides with (trimethyltin)sodium
作者:Henry G. Kuivila、Gary F. Smith
DOI:10.1021/jo01302a036
日期:1980.7
The nature of electronic interactions governing the control of Π-facial selectivity in the capture of 5-substituted(X)-2-adamantyl radicals: Electrostatic versus hyperconjugative effects
作者:William Adcock、Christopher I. Clark、Neil A. Trout
DOI:10.1016/s0040-4039(00)76536-1
日期:1994.1
An electrostatic rather than a hyperconjugative effect appears to be the dominant factor governing the control of Pi-facial selectivity in the capture of 5-substituted(X)-2-adamantyl radicals.