HCID 14649483, compound → HCID 19699945, compound

Participants

Reaction Steps

The diethyl 1-ethoxycarbonyl-4-(tetrahydropyran-2-yloxy)butylphosphonate prepared in the step (a) was dissolved in 500 ml of methanol, followed by the addition of 20 g of a cation-exchange resin (Dowex 50w-8, H type). The obtained mixture was mildly refluxed for 7 hours, cooled to room temperature, and filtered to remove the resin. The filtrate was distilled to remove the solvent, giving 68.8 g of the title compound.

Provenance & Evidence