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ChemInform Abstract: KH2PO4 Promoted Practical and Environmentally Friendly Preparation of Coumarin-3-carboxylic Acids under Solvent-Free Condition.
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文摘
A green Knoevenagel-intramolecular cyclization cascade reaction of Meldrum′s acid with ortho-hydroxybenzaldehydes affords 3-coumarincarboxylic acids in good to high yields.

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