... In addition, we attempted to synthesize (3S,4S)-Boc-statine (1) (Scheme [1] ). The synthesis began with the well ... [21]. Scheme 1 Synthesis of Boc-statine (1). Reagents and conditions: (a) (Boc) 2 O, aq NaOH, 1,4 ... In addition, we synthesized Boc-statine (1) in six steps from l-leucine ...