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This article explores the use of chromium-promoted dearomative hydrocyanoalkylation in organic synthesis. The authors emphasize the versatility of the cyano group and the potential for using simple alkylnitriles as cost-effective sources. They acknowledge the challenges of dearomatization reactions and the limited range of current methods. The authors present their own research on the efficient dearomative hydrocyanoalkylation of chromium-bound (hetero)arenes using simple alkylnitriles, with a focus on optimizing reaction conditions. This research has the potential to expand the scope of dearomative hydrocyanoalkylation reactions and provide new synthetic building blocks. Additionally, the article discusses a new method for synthesizing complex cyclohexadiene compounds using a chromium-mediated reaction. The authors demonstrate the broad applicability of the reaction by successfully synthesizing various arenes and heteroarenes with different substituents and functional groups. They also extend the methodology to include the synthesis of deuterated cyclohexadienes and the transformation of the products into more structurally complex compounds. The authors highlight the potential applications of this method in the synthesis of bioactive natural products and alkaloids. [Extracted from the article]