Semisynthesis of 14C-labelled leupeptin.
作者:TETSUSHI SAINO、TETSUYA SOMENO、HIROSHI MIYAZAKI、SHINICHI ISHII
DOI:10.1248/cpb.30.2319
日期:——
^<14>C-Labelled leupeptin, Ac-L-[U-14C]-leucyl-L-leucyl-L-argininal, with a specific radioactivity of 20.9 mCi/mmol was prepared by a semisynthetic procedure in which L-leucyl-L-argininal dibutylacetal obtained by an enzymatic cleavage of leupeptin dibutyl-acetal with thermolysin was employed as a key compound. The chemical and radiochemical purities of the labelled leupeptin were found to be over 99% by high performance liquid chromatography using radioisotope and ultraviolet detectors.
采用半合成方法制备了^<14>C 标记的亮肽,Ac-L-[U-14C]-亮氨酰-L-亮氨酰-L-精氨醛,比放射性为 20.9 mCi/mmol。通过使用放射性同位素和紫外线检测器的高效液相色谱法,发现标记的亮肽的化学纯度和放射化学纯度均超过 99%。