The Intramolecular Asymmetric Pauson−Khand Cyclization as a Novel and General Stereoselective Route to Benzindene Prostacyclins: Synthesis of UT-15 (Treprostinil)
作者:Robert M. Moriarty、Neena Rani、Livia A. Enache、Munagala S. Rao、Hitesh Batra、Liang Guo、Raju A. Penmasta、James P. Staszewski、Sudersan M. Tuladhar、Om Prakash、David Crich、Anca Hirtopeanu、Richard Gilardi
DOI:10.1021/jo0347720
日期:2004.3.1
A general and novel solution to the synthesis of biologically important stable analogues of prostacyclin PGI2, namely benzindene prostacyclins, has been achieved via the stereoselective intramolecular Pauson−Khand cyclization (PKC). This work illustrates for the first time the synthetic utility and reliability of the asymmetric PKC route for synthesis and subsequent manufacture of a complex drug substance
合成生物学上稳定的前列环素PGI 2的重要类似物的一般和新颖的解决方案。通过立体选择性分子内Pauson-Khand环化(PKC)已经实现了苯并吲哚前列环素。这项工作首次说明了不对称PKC路线的合成效用和可靠性,可用于合成和随后以多千克规模生产复杂的药物。合成路线克服了单个步骤立体选择性和可伸缩性的问题。合成的关键步骤涉及在苄基OTBDMS基团的作用下,对苯二炔的PKC进行有效的立体选择,该基团是一个临时的立体定向基团,可方便地通过苄基氢解与烯酮PKC产物的催化加氢反应除去。3a,C 9a和C 1)。