Die Hydrolyse von 6<i>exo</i>-substituierten 2<i>exo</i>- und 2<i>endo</i>-Norbornylestern der<i>p</i>-Toluolsulfonsäure. Norbornanreihe. 3. Mitteilung
作者:Walter Fischer、Cyril A. Grob、Georg Von Sprecher、Adrian Waldner
DOI:10.1002/hlca.19800630422
日期:1980.6.6
The Hydrolysis of 6exo-Substituted 2exo- and 2endo-Norbornylp-Toluenesulfonates. Norbornane Series. Part 3
The generation of substituted classical secondary 2-norbornyl cations
作者:Charles F. Wilcox、William J. Tuszynski
DOI:10.1016/s0040-4039(00)88574-3
日期:1982.1
(except the endo, endo isomer) and solvolyzed in 97% hexafluoroisopropanol. The rates and products are most easily interpreted in terms of classical ions. An approximate model of substituent effects allows an estimate of anchimeric assistance in the parent norbornyl ion to be a factor of about 540 at 25° and 18 at 125°.
Polar<i>versus</i>steric effects in the solvolysis of 6<i>endo</i>-substituted 2<i>endo</i>-norbornyl<i>p</i>-toluenesulfonates. Norbornanes, Part 8
作者:Cyril A. Grob、Bettina Günther、Reinhard Hanreich
DOI:10.1002/hlca.19820650718
日期:1982.11.3
The solvolysisrates and products of the 6endo-R-substituted 2endo-norbornyl toluenesulfonates 6a–6i have been determined. The rates of 6a–6g correlate with the inductive constants σ the 6endo-substituents and are not related to the size of the latter. It is therefore concluded that polar rather than steric effects control the exo/endo-rate ratios of norbornyl sulfonates. Products are derived mainly
Norbornanes. Part 10. Solvolysis of the Stereoisomeric 6-Cyano-2-norbornylp-Toluenesulfonates. A Correction
作者:Cyril A. Grob、Danielle Herzfeld
DOI:10.1002/hlca.19820650809
日期:1982.12.15
The solvolysis products of the stereoisomeric 6-cyano-2-norbornyl p-toluene sulfonates 1-4 (R CN) in dioxane/water 7 : 3 have been determined. In contrast to an earlier report the 6exo-cyano-2exo-norbornyl p-toluenesulfonate (1; RCN) yields 30% of the 2endo-alcohol 9 (RCN) beside the 2exo-alcohol 10 and the norbornenes 12 and 13. The results confirm that - I substituents at C(6) reduce 1,3-bridging