The Journal of Organic Chemistry

Preparation and properties of annelated tropylium salts

RP Thummel, P Chayangkoon

Index: Thummel, Randolph P.; Chayangkoon, Paochai Journal of Organic Chemistry, 1983 , vol. 48, # 4 p. 596 - 601

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Citation Number: 17

Abstract

The insertion of methylene into the aromatic ring of benzocyclobutene leads to a mixture of cyclobutane-fused cycloheptatrienes. Treatment of this mixture with a trityl salt affords the cyclobutane-fused tropylium salt in essentially pure form. If this same synthetic approach is applied to other annelated benzenes, bis-and tris-annelated salts can be prepared. The proton and carbon-13 NMR spectra of a series of annelated tropylium salts have been ...