Abstract:
A process for efficiently and industrially advantageously producing an N-formylamino acid by reacting an amino acid or its salt with formamide and/or methyl formate in the presence of a base. A process for efficiently and industrially advantageously producing N-formyl- alpha -aspartylphenylalanine methyl ester, which is a precursor of aspartame, by an enzymatic fusion reaction of N-formylaspartic acid with phenylalanine methyl ester wherein the concentration of N-formylaspartic acid is specified or the reaction is carried out in the presence of a trialkyl phosphate. A process for efficiently and industrially advantageously producing N-formyl- alpha -aspartylphenylalanine methyl ester having a high purity by adjusting the pH value of a phenylalanine methyl ester adduct of N-formyl- alpha -aspartylphenylalanine methyl ester.
Abstract:
Commercially favorable crystals of N-[N-[3-(3-hydroxy-4-methoxyphenyl)propyl]-L- alpha -aspartyl]-L-phenylalanine 1-methyl ester, which is useful as a sweetener with a high degree of sweetness, having a high stability and a good purity.
Abstract:
A process for efficiently producing a monatin useful as a sweetener, especially an optically active monatin, comprising carrying out a reaction of isomerization at 2-position of a monatin whose 2-position and 4-position configurations are different from each other in the presence of an aldehyde in a mixed solvent of water and organic solvent at a pH of 4 to 11 and simultaneously performing crystallization of a monatin whose 2-position and 4-position configurations are identical with each other or a salt thereof.
Abstract:
It is intended to newly provide crystals of non-natural stereoisomer salts of monatin which are usable as sweeteners. Because of being stable and having a high degree of sweetness, these crystals are expected as useful as sweeteners or components thereof as well as agents for imparting sweetness to foods and drinks. It is also possible to provide, for example, sweeteners and sweetened foods and drinks with the use of the above salt crystals as novel sweetening substances. These stereoisomer salts include (2S,4R), (2R,4R) and (2R,4S) isomer salts of monatin. Among all, the (2R,4R) isomer salts of monatin are particularly favorable.
Abstract:
Phosphoric acid- aminoacid-polyvalent metal complex salts of formula RaMgbMcHdPO4.nH2O (I) and RaaMgbaMcaHdPO4(PO3)m.n1H2O (II) are new. R = cation of a basic amino acid; M = m-valent metal, but not Mg; m = 2 or 3; a = 0.05-1.0; b = 0.85-1.43; c = 0.02-0.6; d = 0-0.3; a+2b+mc+d = 3; n = 0-20; aa = 0.05-0.4; ba = 0.9-1.47; ca = 0.01-1.4; d = 0-0.3; aa+2ba+mXca+d = m+3; m = 0-1.12. Also claimed is a powder or granular feed additive composition for ruminants containing a complex (I) which is insoluble in neutral and alkaline water, and soluble in acidic water.
Abstract:
A sweetener composition improved in the solubility of an otherwise poorly soluble high-sweetness synthetic sweetener aspartame (APM), characterized by comprising aspartame and acesulfame K as the active ingredient selected in such a manner that acesulfame K accounts for 5-90 wt.% of the whole and that the grain diameter of each ingredient falls within the region where the velocity of dissolution of the mixture thereof is greater than that of aspartame alone.
Abstract:
A granular sweetener improved in the solubility of an otherwise poorly soluble high-sweetness synthetic sweetener aspartame (APM), characterized by containing aspartame and acesulfame K as the active ingredient in such a manner that acesulfame K accounts for 5-90 wt.% of the whole and comprising granules with the maximum grain diameter of about 1,400 mu m or less.
Abstract:
3-(3-Hydroxy-4-methoxyphenyl)-3-methylbutyric acid can be obtained by substituting the substituent at the 3-position of the benzene ring of a butyric acid derivative which can be easily and efficiently produced by reacting a hydroxyl-protected 2-methoxyphenol, wherein the hydroxyl group of 2-methoxyphenol is protected in the form of a sulfonate, with 3-methylcrotonic acid in the presence of an acid. By further converting the carboxyl group into a formyl group, 3-(3-hydroxy-4-methoxyphenyl)-3-methyl butyl aldehyde can be easily produced. This aldehyde derivative can be easily derived into a compound, which is excellent as a sweetener with a high sweetness, by reductive alkylation with Aspartame.
Abstract:
A method of purifying and recovering a sweetener efficiently in a high yield without conducting complicated steps, which comprises contacting crude methyl N-(3,3-dimethylbutyl)-α-L-aspartyl-L-phenylalaninate containing at least methyl α-L-aspartyl-L-phenylalaninate as an impurity with a mixed solvent having two layers respectively consisting of water and an organic solvent immiscible with water to extract the methyl N-(3,3-dimethylbutyl)-α-L-aspartyl-L-phenylalaninate with the organic solvent layer.