摘要:
The present invention relates to a 3-substituted-phenyl-3-merthylbutyric acid and 3-substituted-phenyl-3-merthylaldehyde derivatives, which are useful in the production of N-[N-[3-(3-hydroxy-4-methoxyphenyl)-3-methylbutyl]-L-α-aspartyl]-L-phenylalanine 1-methyl ester, which is a sweetener with high sweetening potency.
摘要:
The present invention relates to a 3-substituted-phenyl-3-merthylbutyric acid and 3-substituted-phenyl-3-merthylaldehyde derivatives, which are useful in the production of N-[N-[3-(3-hydroxy-4-methoxyphenyl)-3-methylbutyl]-L-α-aspartyl]-L-phenylalanine 1-methyl ester, which is a sweetener with high sweetening potency.
摘要:
The present invention relates to a 3-substituted-phenyl-3-merthylbutyric acid and 3-substituted-phenyl-3-merthylaldehyde derivatives, which are useful in the production of N-[N-[3-(3-hydroxy-4-methoxyphenyl)-3-methylbutyl]-L-&agr;-aspartyl]-L-phenylalanine 1-methyl ester, which is a sweetener with high sweetening potency.
摘要:
N-[N-[3-(phenyl having various substituent group(s) on the benzene ring)propyl]-L-&agr;-aspartyl]-L-phenylalanine 1-methyl ester derivatives, which are useful as sweeteners, may be conveniently produced on an industrial scale at a high yield by reductively alkylating aspartame with a 3-(phenyl having specified substituent group(s) on the benzene ring)-2-propenyl aldehyde and hydrogen in the presence of a catalyst and a base.
摘要:
A crystallization process for forming a stable crystal of N-(3,3-dimethylbutyl)-APM, which comprises using either water or a mixture of water with a lower alcohol as the crystallizing solvent and controlling the crystallization point to 30° C. or above; and another crystallization process therefor, which comprises using either water or a mixture of water with a lower alcohol as the crystallizing solvent and using as the seed crystal a crystal of N-(3,3-dimethylbutyl)-APM exhibiting peculiar peaks of diffracted X-ray at least at diffraction angles (2θ, CuKα ray) of 6.0°, 24.8°, 8.2° and 16.5° to thereby crystallize the above objective crystal preferentially. These crystallization processes enable the constant formation of stable crystals of N-(3,3-dimethylbutyl)-APM at a low cost.
摘要:
Disclosed in the present application are a method for preparing highly-stable A-type crystals by controlling and maintaining the product temperature of B-type N-(3,3-dimethylbutyl)-APM crystals at 25 to 80° C. under an absolute humidity of 0.203 kg/kg or less environment, thereby effecting crystal transition; and a method for preparing A-type crystals by controlling and maintaining the product temperature of D-type crystals of N-(3,3-dimethylbutyl)-APM at 25 to 80° C. under an absolute humidity of 0.0550 kg/kg or less environment, thereby effecting crystal transition. According to these crystal transition methods, highly stable crystals can be prepared stably and at a low cost.
摘要:
N-[N-[3-(2-hydroxy-substituted phenyl)propyl]-L-α-aspartyl]-L-phenylalanine 1-methyl ester derivatives, which are useful as sweeteners, may be conveniently produced by subjecting a 2-hydroxychroman derivative having various substituents on the benzene ring and aspartame to a reductive alkylation reaction. These compounds may be purified by subjecting such a derivative containing one or more impurities to a crystallization step to crystallize the same. Further, there are provided a process for producing dialkoxychroman derivatives useful as intermediates for the production of such aspartame derivatives in the above process, and novel dialkoxychroman derivatives thus produced, which are excellent as the production intermediate.
摘要:
The present invention relates to processes of producing glutamic acid compounds, for example, monatin, which are useful as, for example, production intermediates for sweetener or pharmaceutical products.
摘要:
The present invention relates to processes of producing glutamic acid compounds, for example, monatin, which are useful as, for example, production intermediates for sweetener or pharmaceutical products.