Abstract: The present invention has as subject compounds of formula: ##STR1## in which Y is C.sub.2 H.sub.5, (CH.sub.3).sub.2 CH or (R) CH(OH)CH.sub.3, and R" is (S) CH(C.sub.2 H.sub.5)C.sub.6 H.sub.5, (S) CH(CH.sub.3)C.sub.6 H.sub.5 or (R) CH(CH.sub.2 OCH.sub.3)C.sub.6 H.sub.5. These compounds are useful as sweetening agents.

Abstract: The present invention has as subject compounds of formula: ##STR1## in which Y is C.sub.2 H.sub.5, (CH.sub.3).sub.2 CH or (R) CH(OH)CH.sub.3, and R" is (S) CH(C.sub.2 H.sub.5)C.sub.6 H.sub.5, (S) CH(CH.sub.3)C.sub.6 H.sub.5 or (R) CH(CH.sub.2 OCH.sub.3)C.sub.6 H.sub.5. These compounds are useful as sweetening agents.

Abstract: Novel sweetening compound characterized in that it is N-?N-(3,3-dimethylbutyl)-L-.alpha.-aspartyl!-L-hexahydrophenylalanine 1-methyl ester of formula: ##STR1## and its method of preparation characterized in that an aqueous/alcohol solution of pH 4.5-5 of aspartame and 3,3-dimethylbutyraldehyde at room temperature is treated with hydrogen at a pressure of 3 bars in the presence of a catalyst based on platinum such as platinum black and platinum oxide and in that the product formed is purified by precipitation and filtration after evaporation in vacuo of the alcohol part of the solvent.

Abstract: A method of preparing N- N-(3,3-dimethylbutyl)-L-.alpha.-aspartyl!-L-phenylalanine 1-methyl ester of the formula ##STR1## useful as a sweetening agent, wherein an aqueous-alcoholic solution of aspartame and 3,3-dimethylbutyraldehyde of pH 4.5-5 is treated, at room temperature, with hydrogen at a pressure less than or equal to 1 bar, in the presence of a catalyst selected from the group comprising platinum or palladium on activated carbon or in the form of platinum or palladium black, and wherein the product formed is purified by precipitation and filtration after removal of the alcohol part of the solvent under vacuum.

Abstract: Lower alkyl esters of compounds of the formula ##STR1## wherein Z is hydrogen or hydroxyl and R is a hydrocarbyl group optionally substituted by hydroxy and/or alkoxy group, are useful as sweetening agents.

Abstract: The present invention relates to a novel sweetening agent and to its method of preparation. This novel sweetening agent is a 2-substituted acyl derivative of L-aspartic or L-glutamic acid and has the general formula ##STR1## R being an acyl group of the formula ##STR2## and R' being a group of the formula ##STR3## R.sub.1, R.sub.2, R.sub.3, X, Y and Z being variously defined. This novel sweetening agent is essentially characterized by a high sweetening potency and a high stability compatible with the conditions of industrial use, and is applied especially for sweetening soft drinks.

Abstract: The present invention relates to a novel sweetening agent and to its method of preparation. This novel sweetening agent is a 2-substituted acyl derivative of L-aspartic or L-glutamic acid and has the general formula ##STR1## R being an acyl group of the formula ##STR2## and R' being a group of the formula ##STR3## R.sub.1, R.sub.2, R.sub.3, X, Y and Z being variously defined. This novel sweetening agent is essentially characterized by a high sweetening potency and a high stability compatible with the conditions of industrial use, and is applied especially for sweetening soft drinks.

Abstract: The present invention relates to a novel sweetening agent and to its method of preparation. This novel sweetening agent is a 2-substituted acyl derivative of L-aspartic or L-glutamic acid and has the general formula ##STR1## R being an acyl group of the formula ##STR2## and R' being a group of the formula ##STR3## R.sub.1, R.sub.2, R.sub.3, X, Y and Z being variously defined. This novel sweetening agent is essentially characterized by a high sweetening potency and a high stability compatible with the conditions of industrial use, and is applied especially for sweetening soft drinks.

Abstract: The present invention relates to novel sweetening agents. These sweetening agents have the general formula ##STR1## in which R is a 5,6,7,8-tetrahydro-1-naphthoyl or 1-naphthoyl radical, R' is a 2-cyanopyrid-5-yl radical and n is equal to 2. These novel sweetening agents are characterized by an extremely high sweetening potency and a very high stability compatible with all the conditions of industrial use.

Abstract: The present invention relates to a novel sweetening agent and to its method of preparation. This novel sweetening agent is a 2-substituted acyl derivative of L-aspartic or L-glutamic acid and has the general formula ##STR1## R being an acyl group of the formula ##STR2## and R' being a group of the formula ##STR3## R.sub.1, R.sub.2, R.sub.3, X, Y and Z being variously defined. This novel sweetening agent is essentially characterized by a high sweetening potency and a high stability compatible with the conditions of industrial use, and is applied especially for sweetening soft drinks.

Abstract: Compounds of the formula: ##STR1## in which: X represents at least one lone-electron pair donor group;A represents an oxygen or a sulfur atom, or an optionally substituted imino or methylene group;R represents a hydrogen atom or an alkyl group of 1 to 4 carbon atoms;n represents a number equal to zero or to one;B represents a COOH or COOM group (M designating a cation);Y represents either a lone-electron pair donor group, or an alkyl group R' of 1 to 4 carbon atoms;Z representseither an optionally substituted hydrophobic group R", R" designating an alkyl, cycloalkyl or aryl group of 1 to 12 carbon atoms;or a lone-electron pair donor group on which a hydrophobic group R" is fixed;are useful as sweetening agents.