Chemische Berichte

Synthesis and reactions of oligomethylene??clamped 1 H??azepines and benzene imines. Their valence tautomeric equilibrium and nitrogen stereochemistry

W Lange, W Tückmantel

Index: Lange, Walter; Tueckmantel, Werner Chemische Berichte, 1989 , vol. 122, p. 1765 - 1776

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Citation Number: 10

Abstract

Abstract Syntheses of the clamped 1 H-azepines and benzene imines, 6a, 5b/6b, and 5c, and of some of their N-derivatives are described, and the positions of their valence tautomeric equilibria are examined. The N-methyl and N-chloro substituents favour the closed valence tautomer whereas the N-methoxycarbonyl group shifts the equilibrium towards the open isomer. The N-trimethylsilyl group also exerts a slight effect in the latter ...