We have developed robust, operationally simple syntheses of fluorenes and of dibenzo[g,p]chrysenes through oxidative cascade processes. These structures that are commonly encountered in optoelectronic materials, dyes, and pharmaceutical products are accessible from 1,4-dioxaspiro[4.5]decan-8-one. The reactions are conducted open to air with inexpensive, safe CuBr2 or CuCl2.
Cody F Dickinson, Glenn P A Yap, Marcus A Tius. Synthesis of Fluorenes and Dibenzo[g,p]chrysenes through an Oxidative Cascade. The Journal of organic chemistry. 2022 Jan 21;87(2):1559-1563
PMID: 35014253
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