Directed Zincation or Magnesiation of the 2-Pyridone and 2,7-Naphthyridone Scaffold Using TMP Bases
作者:Dorothée S. Ziegler、Robert Greiner、Henning Lumpe、Laura Kqiku、Konstantin Karaghiosoff、Paul Knochel
DOI:10.1021/acs.orglett.7b02690
日期:2017.11.3
6-tetramethylpiperidyl) followed by trapping with electrophiles provided functionalized 2-pyridones and 2,7-naphthyridones. I/Mg exchange of iodinated 2-pyridone and 2,7-naphthyridone using i-PrMgCl·LiCl afforded magnesiated intermediates that reacted with electrophiles. A second magnesiation of the 2-pyridone scaffold was achieved by using TMPMgCl·LiCl. Additionally, we report CoCl2-catalyzed cross-couplings of
已经开发了2-吡啶酮和2,7-萘啶酮支架的区域选择性锌化。使用TMP 2 Zn·2MgCl 2 ·2LiCl(TMP = 2,2,6,6-四甲基哌啶基),然后用亲电试剂捕集,得到甲氧基乙氧基甲基(MEM)保护的化合物,得到官能化的2-吡啶酮和2,7-萘啶酮。使用i - PrMgCl·LiCl进行碘化2-吡啶酮和2,7-萘啶酮的I / Mg交换,得到了与亲电子试剂反应的氧化镁中间体。通过使用TMPMgCl·LiCl,对2-吡啶酮支架进行了第二次放大。另外,我们报道了CoCl 2催化的1-氯-2,7-萘啶与芳基卤化锌的交叉偶联。