A simple method for semi-synthesis of peptidyl argininals as potent inhibitors of trypsin-like proteases.
作者:TETSUYA SOMENO、SHIN-ICHI ISHII
DOI:10.1248/cpb.34.1748
日期:——
A simple method was developed for the conversion of leupeptin (acetyl-Leu-Leu-argininal) to other peptidyl argininals. Argininal dibutylacetal, a key intermediate, was produced by enzymatic digestion of leupeptin dibutylacetal with Pronase E and was isolated by column chromatography on CM-52 cellulose. Nα-Blocked peptides (or amino acids) were connected to the α-amino group of this intermediate by conventional methods, and finally the acetal protecting group was removed by mild acid treatment to recover the essential aldehyde function. This novel method is applicable to large-scale preparation of many kinds of peptidyl argininals, which are promising candidates as specific inhibitors of trypsin-family proteases.
研究人员开发了一种简单的方法,可将亮肽素(乙酰基-Leu-Leu-精氨酸)转化为其他肽基精氨酸。精氨酸二丁基乙醛是一种关键的中间体,它是用 Pronase E 酶解亮氨酸二丁基乙醛后产生的,并通过 CM-52 纤维素柱层析分离出来。用传统方法将 Nα 嵌段肽(或氨基酸)连接到该中间体的 α-氨基上,最后通过弱酸处理去除乙缩醛保护基,以恢复必要的醛功能。这种新方法适用于大规模制备多种肽基精氨酸,有望成为胰蛋白酶家族蛋白酶的特异性抑制剂。