J. Tsunetsugu, Masaru Sato, S. Ebine
Jul 5, 1974
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Journal
Chemistry Letters
Abstract
Tropenylation of 3,4,5-trimethoxyaniline (II) with tropenylium ion (I), generated by action of acid on 7-ethoxy-1,3,5-cycloheptatriene, gave C-tropenyl derivative (III) and its Schiff base (VI). Further reaction of (III) with (I) gave not only tropenylation products (IV) and (XI) but also detropenylation product (II). Detropenylation has proved to take place in the presence of acid.