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Carbon Participation in the Solvolysis of 6- and 7-Substituted 2-Norbornyl p-Toluenesulfonates. Norbornanes, Part 11

✍ Scribed by Peter Flury; Cyril A. Grob

Publisher
John Wiley and Sons
Year
1983
Tongue
German
Weight
473 KB
Volume
66
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

The solvolysis rates and products of several 7‐anti‐substituted 2‐endo‐norbornyl p‐toluenesulfonates 11 have been determined and compared with those of the previously reported 6‐exo‐substituted 2‐exo‐norbornyl p‐toluenesulfonates 1. Although the number of bonds between the substituent and the reaction site is the same in the two series, the inductive effect of the substitutents is transmitted far more strongly in the 6‐exo‐2‐exo‐series 1 than in the 7‐anti‐2‐endo‐series 11; i.e. their inductivities differ widely. It is concluded that through space induction involves graded bridging of the substituent‐bearing C‐atom to the incipient cationic center at C(2) and that this involves differential bridging strain. The different reactivities of unsubstituted 2‐exo‐ and 2‐endo‐norbornyl derivatives can then be ascribed to a stereoelectronic effect.

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