(-)-Isopulegol → (-)-Menthol

Participants

Reaction Steps

In a 500-mL autoclave were added 100.0 g (0.65 mol) of the 1-isopulegol obtained in Example 42 and 0.4 g of Raney nickel in a nitrogen atmosphere. Hydrogenation was conducted under a hydrogen pressure of 2.5 MPa at 70° C. for 10 hours. The reaction mixture was filtered and the residue was distilled to obtain 92.3 g (0.59 mol, 90% e.e.) of 1-menthol.

Provenance & Evidence