A Short Synthesis of the Factor-Xa Inhibitor DX-9065a using palladium-catalyzed key steps
作者:Christiane Kehr、Richard Neidlein、Richard A. Engh、Hans Brandsretter、Ralf Kucznierz、Herbert Leinert、Klaus Marzenell、Klaus Strein、Wolfgang Von Der Saal
DOI:10.1002/hlca.19970800322
日期:1997.5.12
We describe a new, efficient synthesis of DX-9065a (4), a potent inhibitor of the blood coagulation enzyme factor Xa (fXa) which has previously been prepared in more than 20 steps. We saved approximately 10 steps starting with a Pd-catalyzed cyanation of the triflate 10 of 7-methoxynaphthalen-2-ol (9). After cleavage of the MeO group with boron tribromide, the triflate 6 was coupled to acrylate 5 in
我们描述了一种新的,高效的DX-9065a(4)合成方法,DX-9065a是一种有效的凝血酶因子Xa(fXa)抑制剂,以前已在20多个步骤中进行了制备。我们从7-甲氧基萘-2-醇(9)的三氟甲磺酸酯10的钯催化氰化反应开始,节省了大约10个步骤。在用三溴化硼裂解MeO基团之后,三氟甲磺酸酯6在Heck反应(3)中与丙烯酸酯5偶联。随后的转换导致了DX-9065a。