An improved synthesis of (S)-aspartyl-(7,7-dimethylnorborn-2R-yl)-(S)-alanine methyl ester, a new high intensity artificial sweetener
作者:Yoshifumi Yuasa、Toru Watanabe、Akira Nagakura、Haruki Tsuruta、George A. King、James G. Sweeny、Guillermo A. Iacobucci
DOI:10.1016/s0040-4020(01)88486-6
日期:1992.1
(S)-Aspartyl-(7,7-dimenthylnorborn-2R-yl)-(S)-alanine methylester (1) was synthesized in nine steps from (+)-α-fenchyl alcohol (3) as a chiral synthon. Crucial steps for controlling the side-chain stereochemistry of 1, required for the manifestation of sweetness, were the catalytic hydroformylation of the olefin 4 and the enzymaticresolution of the racemic amino acid 9 using acylase I.