(IR,2S)-O-(2-Dimet~zyla~nino-l-phenylehtyldtro/x)ylarnirze ( 3 ) To a suspension of N-alkoxyphthalimide derivative (13) 2a (13.0 g , 40 mmol) in ethanol (120 mL), anhydrous hydrazine (2.0 mL, 63 mmol) was added. The mixture was heated under re- flux for 12 h and then ...