| 摘要 |
NEW MATERIAL:A compound expressed by formula I [R represents (-),alpha-fenchyl, (+),alpha-fenchyl or (+),beta-fenchyl]. EXAMPLE:L-Aspartyl-O-(-),alpha-fenchylserine methyl ester. USE:A sweetening agent useful for foods, medicaments, etc., as it has superior stability in an aqueous solution. PREPARATION:N-Carbobenzoxy-beta-benzyl L-aspartate expressed by formula II is condensed with O-(-),alpha-fenchylserine methyl ester expressed by formula III to afford the compound expressed by formula IV, followed by elimination of protecting groups by catalytic reduction. |
