Modular, efficient synthesis of asymmetrically substituted piperazine scaffolds as potent calcium channel blockers
作者:Andrey Borzenko、Hassan Pajouhesh、Jerrie-Lynn Morrison、Elizabeth Tringham、Terrance P. Snutch、Laurel L. Schafer
DOI:10.1016/j.bmcl.2013.03.114
日期:2013.6
A novel approach to the synthesis of substituted piperazines and their investigation as N-type calcium channel blockers is presented. A common scaffold exhibiting high activity as N-type blockers is N-substituted piperazine. Using recently developed titanium and zirconium catalysts, we describe the efficient and modular synthesis of 2,5-asymmetrically disubstituted piperazines from simple amines and
提出了一种新的合成取代哌嗪的方法,并将其作为N型钙通道阻滞剂进行了研究。作为N型阻滞剂表现出高活性的常见支架是N-取代的哌嗪。使用最近开发的钛和锆催化剂,我们描述了由简单的胺和炔烃有效和模块化合成2,5-不对称双取代的哌嗪。该方法仅需要三个分离/纯化方案,并且不需要保护/去保护步骤就可以以中等到高收率的非对映选择性合成2,5-二烷基哌嗪。筛选合成的哌嗪具有N型通道阻断活性和选择性,显示出在氮(位置1)上具有苯甲基和未保护的醇官能化侧链的化合物的最高活性。