Bodanszky M, Tolle J C
Int J Pept Protein Res. 1977 Nov;10(5):380-4.
Acylation of amino acid beta-naphthylamides with protected (Boc) amino acidisobutylcarbonic acid mixed anhydrides resulted in each case in the formation of some undesired by-product: an isobutyloxycarbonylamino acid beta-naphthylamide. The amount of this second acylation product was particularly high, with the hindered amino acids valine and isoleucine as carboxyl-components. The nature of the amino component had no major influence on the extent of this side reaction.
氨基酸β-萘酰胺与受保护的(叔丁氧羰基)氨基酸异丁基碳酸混合酸酐进行酰化反应,每种情况下都会生成一些不需要的副产物:异丁氧基羰基氨基酸β-萘酰胺。这种第二种酰化产物的量特别高,尤其是当带有位阻的氨基酸缬氨酸和异亮氨酸作为羧基成分时。氨基成分的性质对这种副反应的程度没有重大影响。