反应详情

To a solution of 2.2 g 1-tert-Butoxycarbonylamino-cyclobutanecarboxylic acid benzyl ester in 20 ml dichloromethane were added 8 ml TFA. After stirring for 4 h the mixture was concentrated and the residue codistilled with toluene. The free amine was obtained by treatment with (Polystyrylmethyl)trimethylammonium bicarbonate in MeCN. Yield: 1.7 g

1. concentrationwas concentrated