Synthesis of Tribenzocycloheptatriene and Related Compounds
作者:ERNST D. BERGMANN、JOSEPH KLEIN
DOI:10.1021/jo01098a002
日期:1958.4
1-Benzylidene-2,3:4,5:6,7-tribenzocyclohepta-2,4,6-trienes: synthesis and photochemistry of a series of optically active potential triggers for physical amplification of a photoresponse in liquid crystalline media
作者:B. S. Udayakumar、Gary B. Schuster
DOI:10.1021/jo00067a068
日期:1993.7
Palladium-Catalyzed [4 + 3] or [2 + 2 + 3] Annulation via C–H Activation and Subsequent Decarboxylation: Access to Heptagon-Embedded Polycyclic Aromatic Hydrocarbons
attractive challenge. Herein a novel palladium-catalyzed [4 + 3] decarboxylative annulation of 2-iodobiphenyls with 2-(2-halophenyl)acrylic acids is reported, which provides an efficient approach for assembling various tribenzo[7]annulenes via a C–H activation and decarboxylation process. Moreover, tribenzo[7]annulenes can be also synthesized via a [2 + 2 + 3] decarboxylative annulation strategy by employing