反应详情

N-t-Butoxycarbonyl-α-aminoisobutyryl-α-L-aspartyl-L-phenylalanine methyl ester (2.3 g) was dissolved under ice cooling in 4N-HCl/dioxane (20 ml), and the mixture was stirred for one hour. Ethyl ether (150 ml) was added, and the crystals which separated out were collected by filtration. Yield: 1.8 g.

1. customthe crystals which separated out
2. filtrationwere collected by filtration