Cu‐Catalyzed Hydroxymethylation of Unactivated Alkyl Iodides with CO To Provide One‐Carbon‐Extended Alcohols
作者:Siling Zhao、Neal P. Mankad
DOI:10.1002/anie.201801814
日期:2018.5.14
We have developed a reductive carbonylation method by which unactivated alkyliodides can be hydroxymethylated to provide one‐carbon‐extended alcohol products under Cu‐catalyzed conditions. The method is tolerant of alkyl β‐hydrogen atoms, is robust towards a wide variety of functional groups, and was applied to primary, secondary, and tertiary alkyliodide substrates. Mechanistic experiments indicate
Cu-Catalyzed Carbonylative Silylation of Alkyl Halides: Efficient Access to Acylsilanes
作者:Li-Jie Cheng、Neal P. Mankad
DOI:10.1021/jacs.9b12043
日期:2020.1.8
A Cu-catalyzed carbonylative silylation of unactivated alkyl halides has been developed, enabling efficient synthesis of alkyl-substituted acylsilanes in high yield. A variety of functional groups are tolerated under the mild reaction conditions, and primary, secondary and tertiaryalkyl halides are all applicable. The practical utility of this method has been demonstrated in the synthesis of acylsilanes
已开发出未活化的烷基卤化物的 Cu 催化羰基化硅烷化,能够以高产率高效合成烷基取代的酰基硅烷。在温和的反应条件下可耐受多种官能团,伯、仲、叔烷基卤均适用。该方法的实际效用已在带有不同甲硅烷基的酰基硅烷的合成中以及在一锅中将产物原位还原为相应的-羟基硅烷中得到证明。机理实验表明,甲硅烷基铜中间体通过单电子转移激活烷基卤化物以形成烷基自由基中间体,并且碳 - 卤素键断裂不参与速率决定步骤。
One‐Step Synthesis of Acylboron Compounds via Copper‐Catalyzed Carbonylative Borylation of Alkyl Halides**
作者:Li‐Jie Cheng、Siling Zhao、Neal P. Mankad
DOI:10.1002/anie.202012373
日期:2021.1.25
carbonylative borylation of unactivated alkyl halides has been developed, enabling efficient synthesis of aliphatic potassium acyltrifluoroborates (KATs) in high yields by treating the in situ formed tetracoordinated acylboron intermediates with aqueous KHF2. A variety of functional groups are tolerated under the mild reaction conditions, and primary, secondary, and tertiary alkyl halides are all applicable. In
Synergistic Copper-Catalyzed Reductive Aminocarbonylation of Alkyl Iodides with Nitroarenes
作者:Siling Zhao、Neal P. Mankad
DOI:10.1021/acs.orglett.9b04092
日期:2019.12.20
Cu-catalyzed reductive aminocarbonylation of alkyl iodides using nitroarenes as the nitrogen source. The reaction proceeds with a single copper catalyst playing dual roles of synergistically mediating both carbonylation of alkyl iodides and reduction of nitroarenes, providing acyl iodides and anilines as possible reactive intermediates that then do amidecoupling spontaneously. A diverse range of secondary
Copper‐Catalyzed Substrate‐Controlled Carbonylative Synthesis of α‐Keto Amides and Amides from Alkyl Halides
作者:Fengqian Zhao、Han‐Jun Ai、Xiao‐Feng Wu
DOI:10.1002/anie.202200062
日期:2022.4.19
A copper-catalyzed highly selective double carbonylation of alkyl bromides and amines has been developed. Desired α-keto amides were obtained as the only products. Subsequently, under different conditions, the double and mono-carbonylations of alkyl iodides with amines were also achieved.