Negishi cross-coupling reactions of α-amino acid-derived organozinc reagents and aromatic bromides
作者:Claire L. Oswald、Tomás Carrillo-Márquez、Lorenzo Caggiano、Richard F.W. Jackson
DOI:10.1016/j.tet.2007.11.031
日期:2008.1
Negishi cross-coupling reaction of organozinc iodides derived from α-amino acids with aromaticbromides to give substituted phenylalanine derivatives is described, using either Pd(OAc)2 or Pd2(dba)3 in combination with P(o-Tol)3 as catalyst in DMF at 50 °C. Similar results are obtained using Pd[PtBu3]2 as catalyst. The difference in reactivity displayed between aryl iodides and bromides (ArI>ArBr) has been
描述了将Pd(OAc)2或Pd 2(dba)3与P(o- Tol)3结合使用的方法,描述了α-氨基酸衍生的有机锌碘化物与芳族溴的Negishi交叉偶联反应,得到取代的苯丙氨酸衍生物。在50°C的DMF中作为催化剂。使用Pd [P t Bu 3 ] 2作为催化剂,可获得相似的结果。芳基碘化物和溴化物之间显示出的反应性差异(ArI> ArBr)已用于不对称,正交保护的对亚苯撑双丙氨酸衍生物的简短合成中。
Factor XIa inhibitors
申请人:Merck Sharp & Dohme Corp.
公开号:US10093683B2
公开(公告)日:2018-10-09
The present invention provides a compound of Formula (I)
and pharmaceutical compositions comprising one or more compounds of Formula (I), and methods for using the compounds of Formula (I) for treating or preventing thromboses, embolisms, hypercoagulability or fibrotic changes. The compounds are selective Factor XIa inhibitors or dual inhibitors of Factor XIa and plasma kallikrein.