An alternative synthetic route to 3H-azepines: thermal isomerization of 2,4-and 3,5-di-t-butyl-3a,5a-dihydro-3H-cyclobuta[b]pyrroles

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<jats:title>Abstract</jats:title><jats:p>Photolysis of the <jats:sup>1</jats:sup>H‐azepines (I) gives the Dewar azepines (II), which are cleaved upon treatment with bases, forming the dihydrocyclobutapyrroles (III).</jats:p>

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