A new iridium catalyzed reductive coupling reaction of Grignard reagents and tertiary amides affording functionalised tertiary amine products via an efficient and technically-simple one-pot, two-stage experimental protocol, is reported. The reaction – which can be carried out on gram-scale using as little as 1 mol% Vaska's complex [IrCl(CO)(PPh₃)₂] and TMDS as the terminal reductant for the initial reductive activation step – tolerates a broad range of tertiary amides from (hetero)aromatic to aliphatic (branched, unbranched and formyl) and a wide variety of alkyl (linear, branched), vinyl, alkynyl and (hetero)aryl Grignard reagents. The new methodology has been applied directly to bioactive molecule synthesis and the high chemoselectivity of the reductive coupling of amide has been exploited in late stage functionalization of drug molecules. This reductive functionalisation of tertiary amides provides a new and practical solution to tertiary amine synthesis.

中文翻译：

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通过酰胺与格氏试剂的还原偶联合成叔胺

报道了一种新的铱催化的格氏试剂和叔酰胺的还原偶联反应，该反应通过有效且技术上简单的一锅两阶段实验方案提供功能化的叔胺产物。反应–可以使用低至1 mol％的Vaska络合物[IrCl（CO）（PPh ₃）₂进行克级反应。]和TMDS作为初始还原活化步骤的末端还原剂–耐受从（杂）芳族到脂肪族（支链，直链和甲酰基）的各种叔酰胺，以及各种烷基（直链，支链），乙烯基，炔基和（杂）芳基格氏试剂。该新方法已直接应用于生物活性分子合成，并且在药物分子的后期功能化中已利用了酰胺的还原偶联的高化学选择性。叔酰胺的这种还原功能化为叔胺合成提供了一种新的实用解决方案。