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Incorporating crystalline organic semiconductors into electronic devices requires understanding of heteroepitaxy given the ubiquity of heterojunctions in these devices. However, while rules for commensurate epitaxy of covalent or ionic inorganic material systems are known to be dictated by lattice matching constraints, rules for heteroepitaxy of molecular systems are still being written. Here, it...
Herein, we report the synthesis of a series of π‐expanded coumarin derivatives by the selective C−H alkenylation of β‐naphthol in the presence of a palladium catalyst. The use of an anionic thioether ligand is critical for ensuring the high reactivity of this reaction; it enables low catalyst loadings, mild reaction conditions, and the use of acetic acid as a green solvent. This chemistry is widely...
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