First Synthesis and Determination of the Absolute Configuration of Sulphostin, a Novel Inhibitor of Dipeptidyl Peptidase IV
作者:Masatoshi Abe、Tetsuo Akiyama、Hikaru Nakamura、Fukiko Kojima、Shigeko Harada、Yasuhiko Muraoka
DOI:10.1021/np030491b
日期:2004.6.1
inhibitor, was isolated from the culture broth of Streptomyces sp. MK251-43F3. Determination of the absolute configurations of two asymmetric atoms using the natural product was not achieved due to the small amount of the compound obtained. We synthesized four possible stereoisomers of sulphostin from D- or L-ornithine and compared their physicochemical and biological data to naturally isolated sulphostin
从链霉菌属菌种的培养液中分离出一种新型的二肽基肽酶IV(DPP-IV)抑制剂Sulphostin。MK251-43F3。由于获得的化合物量少,因此无法使用天然产物确定两个不对称原子的绝对构型。我们从D-或L-鸟氨酸合成了四种可能的硫磺汀立体异构体,并将其理化和生物学数据与天然分离的硫磺汀进行了比较。结果,通过X射线晶体学测定,C-3的绝对构型和硫磺汀的磷原子分别为S和R。合成的硫磺汀及其C-3差向异构体对DPP-IV具有很强的抑制活性,IC50值分别为6.0 ng / mL和8.9 ng / mL。因此看来,磷原子的构型主要负责该活性。相反,C-3的构型似乎不影响活动。