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[摘要]：Oxidative cyclodehydrogenation of hexakis(4-alkoxyphenyl)benzene produces a quant. yield of an indenofluorene deriv. I (R = Me, n-hexyl) rather than the expected alkoxy-substituted hexa-peri-hexabenzocoronene (HBC) II (R = n-hexyl). The structure of the unexpected indenofluorene I was established by X-ray crystallog. The mechanistic considerations for the formation of the indenofluorene deriv. led us to devise an alternative synthesis of elusive alkoxy-substituted HBC II - a potentially important, disk-shaped structure for the prepn. of liq. cryst. materials for practical applications in the emerging areas of mol. electronics and nanotechnol. |
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