“…[33] Received: July 29, 1999 Originally, 1 was assigned the aS,2R,5R configuration (2). [2,4] Later, this was revised in favor of ()-(aS,2R,5S)-a-amino-2-(2,5-dihydro-5-methyl)furan-2-acetic acid (1), based on an unambiguous synthesis from d-glucose and an X-ray structure analysis of the N-acetyl derivative. [5,6] Over the last 20 years several strategies for the synthesis of 1 and its stereoisomers were advanced, starting from various carbohydrate precursors, [5,7] substituted furans, [4, 5a] or dimethyl l-tartrate.…”