Synthesis of Tripyreno[2,3,4-abc: 2,3,4-ghi: 2,3,4-mno][18]annulenes
摘要:
The title compounds were prepared in a multi-step synthesis in which primarily the pyrene building blocks were formed (1.2 --> 11a.b). The final reaction step 11a,b --> 12a,b consisted of a threefold trans selective cyclocondensation process that generated the central 18-membered ring. Hexyl oxy or dodecyloxy sidechains attached on the periphery led to the formation of liquid crystalline phases.
Synthesis of Tripyreno[2,3,4-abc: 2,3,4-ghi: 2,3,4-mno][18]annulenes
摘要:
The title compounds were prepared in a multi-step synthesis in which primarily the pyrene building blocks were formed (1.2 --> 11a.b). The final reaction step 11a,b --> 12a,b consisted of a threefold trans selective cyclocondensation process that generated the central 18-membered ring. Hexyl oxy or dodecyloxy sidechains attached on the periphery led to the formation of liquid crystalline phases.