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US 5,013,571 AGranted
Methods for making tetrahydroisoalpha and hexahydroisoalpha acids
AssigneePfizer Inc.
InventorBruce A. Hay
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AssigneePfizer Inc.
InventorBruce A. Hay
Estimating the term…
A method of converting alpha acids to hop flavors by exposing the alpha acids to an environment capable of substantially simultaneously isomerizing and reducing the alpha acids to form either THIAA or HHIAA. Another aspect of this invention is directed to a method of reducing hop flavors by exposing an isoalpha acid, a dihydroisoalpha acid or a mixture thereof to conditions suitable to reduce said acids to produce THIAA, HHIAA or a mixture thereof at a pH of about 5 to about 12 in a reaction inert, protic solvent. Yet another aspect of this invention is directed to a method of reducing hop flavors comprising exposing an isoalpha acid, a dihydroisoalpha acid or a mixture thereof to conditions suitable to reduce said acids to produce THIAA, HHIAA or a mixture thereof in a reaction inert, aprotic solvent.
A method of converting alpha acids to hop flavors comprising exposing the alpha acids to an environment, capable of substantially simultaneously isomerizing and reducing the alpha acids to form tetrahydroisoalpha acids, and thus forming tetrahydroisoalpha acids.
A method of converting alpha acids to hop flavors comprising exposing the alpha acids to an environment, capable of substantially simultaneously isomerizing and reducing the alpha acids to form hexahydroisoalpha acids, and thus forming hexahydroisoalpha acids.
A method of reducing hop flavors comprising exposing an isoalpha acid, a dihydroisoalpha acid or a mixture thereof to conditions capable of reducing said acids to produce tetrahydroisoalpha acids, hexahydroisoalpha acids or a mixture thereof at a pH of about 5 to about 12 in a reaction inert, aprotic solvent and thus forming tetrahydroisoalpha acids, hexahydroisoalpha acids or a mixture thereof.
A method of reducing hop flavors comprising exposing an isoalpha acid, a dihydroisoalpha acid or a mixture thereof to conditions capable of reducing said acids to produce tetrahydroisoalpha acids, hexahydroisoalpha acids or a mixture thereof in a reaction inert, aprotic solvent and thus forming tetrahydroisoalpha acids, hexahydroisoalpha acids or a mixture thereof.
Dependencies are inferred from the claim text.