Synthesis and photodimerisation of tetrabenzo[ab,f,jk,o][18]annulenes

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• 作者：Meier ; Herbert ; Fetten ; Michael ; Schnorpfeil ; Christoph ; Yakimansky ; Alexander V. ; Voigt-Martin ; Ingrid G.
• 关键词：Annulenes ; Aggregation ; Dimerisation ; Cyclophanes
• 刊名：Tetrahedron Letters
• 出版年：1999
• 出版时间：June 25, 1999
• 年：1999
• 卷：40
• 期：26
• 页码：4791-4794
• 全文大小：154 K

文摘

The tetrabenzo[ab,f,jk,o][18]annulenes 7a,b, generated in a 5-step synthesis, show photodimerisation and -oligomerisation reactions in the solid state and in solution. The state of aggregation determines the reaction route. Whereas the cyclodimer 8a has a simple cyclobutane structure, the dimer 8b is a highly symmetrical cyclophane.