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4-ethynyltetrahydro-2H-pyran; CAS No.: 1202245-65-5; 4-Ethynyltetrahydro-2H-pyran is a heterocyclic cycle compound, featuring a tetrahydropyran ring and an ethynyl group, useful in the synthesis of natural products with oxygen heterocycles and alkynyl substituents. As a chemical synthesis company, ChemShuttle specializes in producing such oxygen-containing heterocycles, offering clients intermediates that combine ring oxygen with alkyne reactivity. The company s CRO chemical synthesis services ensure the production of this compound with high purity, essential for further functionalization of the ethynyl group via click chemistry or metal-catalyzed reactions. The tetrahydropyran ring provides a stable six-membered oxygen heterocycle, making it suitable for synthesizing glycosides, macrolides, or other bioactive natural product analogs. ChemShuttle s expertise in oxygen heterocycle synthesis supports researchers in accessing versatile intermediates for their synthetic pathways.