Synthesis and biological evaluation of 9-deazaguanine derivatives connected by a linker to difluoromethylene phosphonic acid as multi-substrate analogue inhibitors of PNP
作者:Sadao Hikishima、Mariko Hashimoto、Lucyna Magnowska、Agnieszka Bzowska、Tsutomu Yokomatsu
DOI:10.1016/j.bmcl.2007.05.054
日期:2007.8
9-deaza-9-iodoguanine derivative and omega-alkynyldifluoromethylene phosphonates as a key reaction. DFPP-DG is a very potent PNP inhibitor with apparent inhibition constants (in the presence of 1 mM phosphate) of 4.4 and 8.1 nM versus calf spleen and human erythrocyte PNPs, respectively. One of its analogues, homo-DFPP-DG, with longer chain linking phosphonate and 9-deazaguanine is even more potent versus human enzyme
根据X射线晶体学数据,将9-(5',5'-二氟-5'-膦戊基)-9-脱氮鸟嘌呤(DFPP-DG)设计为针对嘌呤核苷磷酸化酶(PNP)的多底物类似物抑制剂获得9-(5',5'-二氟-5'-膦戊基)鸟嘌呤(DFPP-G)与小牛脾PNP的二元复合物。通过9-脱氮-9-碘鸟嘌呤衍生物和ω-炔基二氟亚甲基膦酸酯之间的Sonogashira-偶联反应实现的接头长度调节DFPP-DG及其类似化合物,这是关键反应。DFPP-DG是一种非常有效的PNP抑制剂,与小牛脾脏和人红细胞PNP相比,表观抑制常数(在1 mM磷酸盐存在下)的抑制常数分别为4.4和8.1 nM。它的类似物之一,hom-DFPP-DG,