L-Asp diester L-Ais-2 nonoester cation has attracted attention of the organic chemists because of their usefulness as chiral catalysk2 For organic reactions, selectivity such as enantioselectivity, diastereoselectivity, and regioselectivity is one of the challenges3 and may often be overcome by biocatalytic reaction^.^ In this article, we describe novel observations which demonstrate that either the a-or@-ester of L-aspartic acid diester may ...
