(R)-3-Amino-3-phenyl propionic acid methylester

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of 2,4-dinitrochlorobenzene (5.1 g, 25 mmol) in methanol (60 mL) was added methyl (3R)-3-amino-3-phenylpropanoate (3.75 g, 21 mmol, prepared according to Davies et. al., Tetrahedron Asymm., 1991, 183) and triethylamine (2.9 mL, 21 mmol). The mixture was brought to reflux, heating in total for 5 hours, and was then cooled and evaporated in vacuo. The residue was purified by flash column chromatography on silica gel, eluting with a mixture of dichloromethane and methanol (95:5), to afford the title compound, [LCMS (Method C, Mobile Phase I) RT=3.22 mins, MH+ 346]. to reflux heating in total for 5 hours was then cooled evaporated in vacuo The residue was purified by flash column chromatography on silica gel eluting with a mixture of dichloromethane and methanol (95:5)