Abstract
Synthesis of New Sulfur‐ and Selenium‐Containing ‘Donor‐Acceptor‐Stabilized’ Systems with Central Bicyclo‐[4.4.1]undeca‐4,6,8,10‐tetraene‐2,3‐diylidene‐ or Bicyclo[4.4.1]undeca‐3,6,8,10‐tetraene‐2,5‐diylidene GroupsSyntheses of starting materials 3–55 and 8 and of the S‐ and containing 1,6‐methano[10]annulene (=1,6‐methanobicyclo[4.4.1]undeca‐1,3,5,7,9‐pentaene) derivatives 12, 13, 15 and 16 are described.

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