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Friedel-Crafts alkylation reactions of biogenic furan derivatives were used to access a series of methylfuran oligomers. Oxidation gave linear and angular conjugated systems with strong chromophores, corresponding to structural fragments that have been proposed as humin submotifs. These products also constitute biobased examples of discrete oligomeric fragments of conjugated, electroactive poly(methylfuran) materials.
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Miao et al. (2026) studied this question.
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