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 Grignardreagents, 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。
Copper(II) Triflate-mediated Addition Reaction of α-Sulfurated Alkylstannanes to Imines: Facile Synthesis of Vicinal-amino Sulfides
作者:Hirotaka Kagoshima、Naoshi Takahashi
DOI:10.1246/cl.2004.962
日期:2004.8
In the presence of copper(II) triflate, the addition reaction of α-sulfurated alkylstannanes to imines proceeded smoothly to give the corresponding vicinal-amino sulfides in good yields.
在三氟甲磺酸铜 (II) 存在下,α-硫化烷基锡烷与亚胺的加成反应顺利进行,以良好的收率得到相应的邻氨基硫化物。
Simple 1,2-Diamine Ligands for Asymmetric Addition of Aryllithium Reagents to Imines
Enantioselective addition of various aryllithiumreagents to aromatic imines was catalyzed (20 mol-%) by readily accessible 1,2-diamines to afford a wide range of protected diarylmethylamines in up to 94 % enantiomeric excess. Furthermore, the absolute configuration of these arylation products was determined by using X-ray crystallography.
各种芳基锂试剂与芳族亚胺的对映选择性加成反应 (20 mol-%) 由易于获得的 1,2-二胺催化,得到多种保护的二芳基甲基胺,对映体过量高达 94%。此外,这些芳基化产物的绝对构型是通过使用 X 射线晶体学确定的。
Mannich-Type Reaction Promoted by an Ionic Liquid
作者:Takahiko Akiyama、Akihiro Suzuki、Kohei Fuchibe
DOI:10.1055/s-2005-864816
日期:——
The Mannich-typereaction of silylenolates with aldimines occurred smoothly with [emim]OTf as a solvent and without the addition of an activator to afford p-amino carbonyl compounds in excellent yields.
Montmorillonite K10 catalyzed Mannich-type reaction and hydrophosphonylation proceeded smoothly in water at room temperature to give β-amino esters and α-amino phosphonates, respectively, in good to high yields.