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Abstract
Abstract The formation of substituted N-ethoxycarbonyl-1(1H)-azepine derivatives is reinvestigated in the thermal reactions of benzene derivatives with ethyl azidoformate. The rate-determining step in these reactions is determined by kinetic experiments to be the decomposition of the azide. The (4+2) π cycloadducts of these azepine derivatives are obtained by thermal reactions with tetracyanoethylene (TCNE) as a dienophile. The formation of compounds 22, 23, 24, 25, 26, and 27 is confirmed by the spectral evidence.
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