Asymmetric synthesis and stereochemical structure–activity relationship of (R)- and (S)-8-[1-(2,4-dichlorophenyl)-2-imidazol-1-yl-ethoxy] octanoic acid heptyl ester, a potent inhibitor of allene oxide synthase
作者:Keimei Oh、Yoichiro Shimura、Kyoko Ishikawa、Yudai Ito、Tadao Asami、Noboru Murofushi、Yuko Yoshizawa
DOI:10.1016/j.bmc.2007.10.095
日期:2008.2.1
afford pure (R)-JM-8686 and (S)-JM-8686. The inhibitory activities and binding affinities of these enantiomers toward allene oxide synthase were determined. We found that the inhibition potency of (R)-JM-8686 is approximately 200 times greater than that of (S)-JM-8686, with IC(50) values of approximately 5+/-0.2 nM and 950+/-18 nM, respectively. The dissociation constants of (R)-JM-8686 and (S)-JM-8686
已经实现了强力烯丙氧化物合酶抑制剂8- [1-(2,4-二氯苯基)-2-咪唑-1-基乙氧基]辛酸庚酯(JM-8686)的两种对映体的制备使用2,4-二氯苯甲酰溴作为起始原料。关键步骤是用手性BINAL-H不对称还原1-(2,4-二氯苯基)-2-咪唑-1-基乙酮。产物通过手性高效液相色谱法(HPLC)纯化,得到纯的(R)-JM-8686和(S)-JM-8686。确定了这些对映异构体对氧化烯合酶的抑制活性和结合亲和力。我们发现(R)-JM-8686的抑制能力是(S)-JM-8686的大约200倍,IC(50)值约为5 +/- 0.2 nM和950 +/- 18分别为nM。