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Highlights a new catalyst improving synthesis of 2H-chromene derivatives under mild conditions, suggesting efficiency in organic reactions.
Sulfonic-acid functionalized hypercrosslinked porous organic polymer was used as a heterogeneous catalyst for intermolecular annulation under mild reaction conditions. 13 C KIE studies suggested a similar mechanism to the homogeneous system.
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Somprasong et al. (2026) studied this question.
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