Preparation of .epsilon.-(.gamma.-glutamyl)-lysine
AssigneeSociete d'Assistance Technique pour Produits Nestle S.A.
InventorsPaul-Andre Finot, Pierre Hirsbrunner, Raymond Bertholet
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Abstract
A process for the preparation of .epsilon.-(.gamma.-glutamyl)-lysine which comprises heating lysine glutamate for at least 5 hours at a temperature of at least 120.degree. C by means of an inert heat-carrier fluid, and isolating .epsilon.-(.gamma.-glutamyl)-lysine from the conversion product thus obtained. The inert heat-carrier fluid can be either a gas such as air or nitrogen, or a liquid such as n-amylalcohol, kerosene, nonane, 1,1,2,2-tetrachloroethane, 1-octanol or 2-ethyl-1-butanol.
Claims9
A process for the preparation of .epsilon.-(.gamma.-glutamyl)-lysine which comprises heating lysine glutamate for at least 5 hours at a temperature of at least 120.degree. C in a heat-carrier fluid which is (a) immiscible with lysine glutamate, (b) chemically inert to lysine glutamate and (c) possesses a boiling point above 120.degree. C., and isolating .epsilon.-(.gamma.-glutamyl)-lysine from the conversion product thus obtained.
A process for the preparation of .epsilon.-(.gamma.-glutamyl)-lysine which comprises heating lysine glutamate for at least 5 hours in air or nitrogen at a temperature which does not exceed a level at which appreciable decomposition of lysine will occur, and isolating .epsilon.-(.gamma.-glutamyl)-lysine from the conversion product thus obtained.
Dependencies are inferred from the claim text.