Synthesis of New Sulfur- and Selenium-Containing 'Donor-Acceptor-Stabilized' Systems with Central Bicycloundeca-4,6,8,10-tetraene-2,3-diylidene- or Bicycloundeca-3,6,8,10-tetraene-2,5-diylidene Groups

Article abstract of DOI:10.1002/hlca.19880710536

Syntheses of starting materials 3-5 and 8 and of the S- and Se-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.