Method for purifying (-)-N-isopulegol and citrus perfume composi

Details Method for purifying (-)-N-isopulegol and citrus perfume composi Method for purifying (-)-N-isopulegol and citrus perfume composi

1995-07-24

1998-06-30

Mullis, Jeffrey

Perfume compositions

Perfume compositions

Ring containing active ingredient

A61K 746

Patent

active

057734100

ABSTRACT:
A method for purifying isopulegol is disclosed, comprising deep cooling isopulegol mainly composed of (-)-n-isopulegol in a solvent for deep cooling mainly comprising acetone to obtain (-)-n-isopulegol having a chemical purity of not less than 99.7% by weight and an optical purity of not less than 99.7%e.e. The thus purified (-)-n-isopulegol is odorless and gives a feeling of freshness, crispness and coolness to a citrus perfume composition.

REFERENCES:
patent: 4217371 (1980-08-01), Sprecker et al.
patent: 5545424 (1996-08-01), Nakatsu et al.
Lund et al., "Composition of Rough Lemon Leaf Oil", Journal of Agricultural and Food Chemistry, pp. 490-494, 1981.
Nakagawa et al., translation of JP 06-65023, Mar. 1994.
Sully et al. "The Optical Rotation of Citronellal", Perfumery and Essential Oil Record, 59, No. 5, pp. 365-366 (May 1968).

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