反应详情

N-t-Butoxycarbonylglycyl-3(R)-methyl-β-alanine benzyl ester 2-4 (3.32 g) in EtOAc (100 mL) cooled to -60° C. was treated with HCl gas until saturated. The mixture was stirred for 30 minutes then the solvent was removed and the residue triturated with ether to give 2-5 as a solid. ##STR59## N-{[6-Nitro-2,3-dihydro-1(1H)-isoindolone-2-yl]acetyl}-3(R)-methyl-β-alanine benzyl ester (2-6)

1. customthe solvent was removed
2. customthe residue triturated with ether