在醛基或酯基存在的情况下,硝基的化学选择性还原与另一种合成转化相结合,从而方便地合成重要的杂环,是当前研究的主题。N -(2-硝基苯基)吡咯-2-甲醛的化学选择性还原环化仅伴随工业试剂连二亚硫酸钠 (Na 2 S 2 O 4 ) 产生不同取代的吡咯稠合N -杂环已首次开发。原位生成的氨基通过化学选择性还原硝基与醛基缩合形成喹喔啉,或与酯基反应形成喹喔啉酮。该协议具有在室温下进行的高效单锅串联还原环化、非常短的反应时间(1 小时)、无水后处理、结晶纯化、分离产率通常 >90%、可观的官能团耐受性和广泛的底物范围。克级合成进一步证明了所开发协议的可扩展性。
Identification and synthesis of major metabolites of Vasopressin V2-receptor agonist WAY-151932, and antagonist, Lixivaptan®
作者:Albert J. Molinari、Eugene J. Trybulski、Jehan Bagli、Susan Croce、John Considine、Jian Qi、Kadum Ali、William DeMaio、Lynne Lihotz、David Cochran
DOI:10.1016/j.bmcl.2007.08.053
日期:2007.11
Small molecule agonists and antagonists of the V-2-vasopressin receptor have been discovered and have undergone clinical trials. In conjunction with these discovery programs, the synthesis and biological testing of various metabolites associated with these clinical targets were actively pursued. We now report the results of our synthetic efforts and the corresponding biological data generated for several of the metabolites of WAY-151932 and CL-347985 (Lixivaptan (R)). (c) 2007 Elsevier Ltd. All rights reserved.