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US 5,858,348 AGranted
Perfume composition containing (4R)-cis-4-methyl-2-substituted-tetrahydro-2H-pyran derivative and method for improving fragrance by using (4R)-cis-4-methyl-2-substituted-tetrahydro-2H-pyran derivative
AssigneeTakasago International Corporation
InventorsHiroyuki Matsuda, Takeshi Yamamoto
Life of this patent
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Abstract
A perfume composition which contains a (4R)-cis-4-methyl-2-substituted-tetrahydro-2H-pyran derivative represented by formula (I): ##STR1## wherein ---- represents a single or double bond, and a method for improving fragrance by using this perfume composition.
Claims6
A perfume composition comprising a (4R)-cis-4-methyl-2-substituted-tetrahydro-2H-pyran derivative represented by formula (I):
- ##STR19## wherein ---- represents a single or double bond;
- and wherein said (4R) -cis-4-methyl-2-substituted-tetrahydro-2H-pyran derivative has a chemical purity of at least 90% by weight and an optical purity of at least 95% ee.
A method for improving a fragrance by using a (4R) -cis-4-methyl-2-substituted-tetrahydro-2H-pyran derivative represented by formula (I):
- ##STR20## wherein ---- represents a single or double bond;
- and wherein said (4R)-cis-4-methyl-2-substituted-tetrahydro-2H-pyran derivative has a chemical purity of at least 90% by weight and an optical purity of at least 95% ee.
Dependencies are inferred from the claim text.