Citronellol → Menthone

HRID 2163483Notes

Reaction equation

HRID 2163483 reaction equation
[CH3:1][C:2](=[CH:4][CH2:5][CH2:6][CH:7]([CH2:9][CH2:10][OH:11])[CH3:8])[CH3:3].[H][H]>>[CH3:8][C@H:7]1[CH2:9][C:10](=[O:11])[C@H:4]([CH:2]([CH3:3])[CH3:1])[CH2:5][CH2:6]1

Participants

3

Reactant 2

HCID 8842CitronellolHCID 178418361HCID 178418361, compound

Product 1

HCID 26447Menthone

Procedure

A process for producing menthol which comprises dehydrogenating citronellol in a reaction system containing a Raney-type catalyst or a metal oxide catalyst at a temperature of about 150° to about 260° C in an atmosphere of hydrogen under a pressure of 0 to about 5 kg/cm2.G to produce menthone as claimed in claim 1, and then, in the same reaction system without separating the catalyst or adding additional catalyst, hydrogenating the menthone produced by decreasing the temperature to about 110° to about 130° C and increasing the hydrogen pressure to about 10 to about 50 kg/cm2 to produce menthol.

Workup

  1. additioncontaining a Raney-type catalyst
  2. customat a temperature of about 150° to about 260° C

Sources & evidence

ORD record
ord-e24825049a11426e80ee1c7c6e728b26
Source dataset
uspto-grants-1979_01
Patent number
US04134919

Reaction notes

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