N-3, 3-dimethylbutyl-L-aspartic acid and esters thereof, the process of
申请人:The NutraSweet Company
公开号:US06077962A1
公开(公告)日:2000-06-20
This invention relates to the chemical synthesis of N-[N-(3,3-dimethylbutyl)-L-.alpha.-aspartyl]-L-phenylalanine 1-methyl ester using peptide coupling methods. The coupling reaction is conducted by condensation of an activated derivative of novel N-neohexyl-L-aspartic acid with L-phenylalanine or L-phenylalanine methyl ester or by enzymatic coupling of N-neohexyl-L-aspartic acid with L-phenylalanine or L-phenylalanine methyl ester. This invention also relates to novel N-(3,3-dimethylbutyl)-L-aspartic acid, derivatives thereof and the preparation thereof. The activated derivative of N-neohexyl-L-aspartic acid may be an anhydride, mixed anhydride, active ester or an intermediate activated derivative thereof.
Synthesis of N-[N-(3,3-dimethylbutyl)-L-α-aspartyl]-L-phenylalanine 1-methyl ester using oxazolidinone derivatives
申请人:Prakash Indra
公开号:US06852875B2
公开(公告)日:2005-02-08
Synthesis of N-[N-(3,3-dimethylbutyl)-L-α-aspartyl]-L-phenylalanine 1-methyl ester by treating N-(3,3-dimethylbutyl)-L-aspartic acid with ketones to give oxazolidinone derivatives, which are condensed with L-phenylalanine methyl ester.
The present invention relates novel flavin derivatives and other flavin derivatives, their use and compositions for use as riboswitch ligands and/or anti-infectives. The invention also provides method of making novel flavin derivatives.
Catalyst modification to enhance neotame production
申请人:——
公开号:US20030088119A1
公开(公告)日:2003-05-08
Processes for using modifying catalysts with improved functionality in the production of neotame are disclosed. The modified catalysts surprisingly have been found to improve the selectivity over conventional catalysts and to reduce the level of certain impurities in neotame production processes.