Thymol → (-)-Menthol

HRID 1439226

Reaktionsgleichung

[CH:1]1[C:10]([OH:11])=[C:6]([CH:7]([CH3:9])[CH3:8])[CH:5]=[CH:4][C:2]=1[CH3:3].C[C@H]1C[C@H](O)[C@H](C(C)C)CC1.C[C@@H]1C[C@H](O)[C@@H](C(C)C)CC1>>[CH3:3][C@H:2]1[CH2:1][C@@H:10]([OH:11])[C@H:6]([CH:7]([CH3:9])[CH3:8])[CH2:5][CH2:4]1

Komponenten

Edukt 3

HCID 6989Thymol

HCID 165675(+)-Menthol

HCID 439263(+)-Neomenthol

Produkt 1

HCID 16666(-)-Menthol

Versuchsvorschrift

Mixtures of 50 to 70 % by weight of thymol with 50 to 30 % by weight of d-neomenthol or d-menthol were used as starting material in accordance with the general conditions described above. In Table I below, column 1 gives the composition of the starting material, column 2 the balance yield of d,l-menthol in percent of the theoretical, whilst the other columns give the contents in the reaction product of d,l-neomenthol, d,l-isomenthol, menthone and other ketones, also hydrocarbons, the OH-number, the optical rotation and the thymol content, calculated from the UV-absorption.

Quellen und Nachweise

ORD-Eintrag: ord-7aa69fc0c11744fc810509713aa1d418
Quelldatensatz: uspto-grants-1977_11
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US04058571

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