反应详情

210 g. of the sodium salt of 3,4-dihydro-2H-pyran-2-carboxylic acid dissolved in 2 liters methanol and hydrogenated at 3 atmosphere pressure over 60 g. haney nickel catalyst. After hydrogen uptake was complete the catalyst was filtered and the solvents removed in vacuo. The residue was acidified with concentrated hydrochloric acid and extracted with chloroform. Distillation gave 143.8 g. product, b.p. 75°-80° C./0.4 mm ND25 = 1.4633.

1. filtrationwas filtered
2. customthe solvents removed in vacuo
3. extractionextracted with chloroform
4. distillationDistillation
5. customgave 143.8 g