Difluoroalkylation of Tertiary Amides and Lactams by an Iridium-Catalyzed Reductive Reformatsky Reaction
作者:Phillip Biallas、Ken Yamazaki、Darren J. Dixon
DOI:10.1021/acs.orglett.2c00438
日期:2022.3.18
An iridium-catalyzed, reductive alkylation of abundant tertiary lactams and amides using 1–2 mol % of Vaska’s complex (IrCl(CO)(PPh3)2), tetramethyldisiloxane (TMDS), and difluoro-Reformatsky reagents (BrZnCF2R) for the general synthesis of medicinally relevant α-difluoroalkylated tertiary amines is described. A broad scope (46 examples), including N-aryl- and N-heteroaryl-substituted lactams, demonstrated
使用 1–2 mol % 的 Vaska 络合物 (IrCl(CO)(PPh 3 ) 2 )、四甲基二硅氧烷 (TMDS) 和二氟 Reformatsky 试剂 (BrZnCF 2 R) 对丰富的叔内酰胺和酰胺进行铱催化还原烷基化,用于描述了药用相关α-二氟烷基化叔胺的一般合成。范围广泛(46 个实例),包括N-芳基-和N-杂芳基取代的内酰胺,表现出优异的官能团耐受性。此外,后期药物功能化、克级合成和常见的下游转化证明了这种新方法的潜在合成相关性。