PROCESSES FOR PRODUCING AND PURIFYING ASPARTAME DERIVATIVES AND PROCESS FOR PRODUCING PRODUCTION INTERMEDIATES

摘要

Processes for producing and purifying N-[N-[3-(2-hydroxy-substituted phenyl)propyl]-L- alpha -aspartyl]-L-phenylalanine 1-methyl ester derivatives, which are useful as sweetening agents, by subjecting 2-hydroxychroman derivatives having various substituents at the benzene ring and Aspartame to a reductive alkylation reaction; a process for producing dialkoxychroman derivatives serving as production intermediates in the above process; and novel dialkoxychroman derivatives.