Mn-Catalyzed Three-Component Reactions of Imines/Nitriles, Grignard Reagents, and Tetrahydrofuran: An Expedient Access to 1,5-Amino/Keto Alcohols
作者:Ruoyu He、Xiqing Jin、Hui Chen、Zhi-Tang Huang、Qi-Yu Zheng、Congyang Wang
DOI:10.1021/ja503520t
日期:2014.5.7
An expedient Mn-catalyzed three-component synthesis of 1,5-amino/keto alcohols from Grignard reagents, imines/nitriles, and tetrahydrofuran (THF) is described, which deviates from the classic Grignard addition to imines/nitriles in THF solvent. THF is split and "sewn" in an unprecedented manner in the reaction, leading to the formation of two geminal C-C bonds via C-H and C-O cleavage. Mechanistic
描述了从格氏试剂、亚胺/腈和四氢呋喃 (THF) 中 Mn 催化的 1,5-氨基/酮醇的三组分合成,这与传统格氏在 THF 溶剂中加入亚胺/腈不同。THF 在反应中以前所未有的方式分裂和“缝合”,导致通过 CH 和 CO 裂解形成两个孪生 CC 键。机理实验和 DFT 计算揭示了催化循环中的自由基和有机锰中间体,以及作为关键反应步骤的 THF 的 α-芳基开环。