A palladium catalyzed reductive aminocarbonylation of benzylic ammonium triflates with nitroarenes for the synthesis of phenylacetamides was developed. Using Pd(acac)2/DPPF catalystsystem, a range of different substituted phenylacetamides were prepared in moderate to good yields from benzylic ammonium triflates and nitroarenes through Csp3−N bond cleavage. A variety of alkyl, aryl, and halide substituents
Efficient Heterogeneous Gold(I)-Catalyzed Direct C(<i>sp</i>
<sup>2</sup>
)-C(<i>sp</i>
) Bond Functionalization of Arylalkynes through a Nitrogenation Process to Amides
作者:Quan Nie、Feiyan Yi、Bin Huang、Mingzhong Cai
DOI:10.1002/adsc.201700783
日期:2017.11.23
heterogeneous gold(I)-catalyzed direct C(sp2)–C(sp) bond functionalization of arylalkynes through a nitrogenation process to amides has been achieved by using an ordered mesoporous silica (MCM-41)-immobilized phosphine gold(I) complex [MCM-41-PPh3-AuCl] as catalyst and silver carbonate (Ag2CO3) as cocatalyst with trimethylsilyl azide (TMSN3) as a nitrogen source, yielding a variety of amides in moderate to
通过使用有序介孔二氧化硅(MCM-41)固定化的磷化膦金(I),实现了第一个非均相金(I)催化的芳族炔烃通过酰胺的氮化过程直接C(sp 2)–C(sp)键的官能化)络合物[MCM-41-PPh 3 -AuCl]作为催化剂,碳酸银(Ag 2 CO 3)作为助催化剂,叠氮化三甲基硅烷基酯(TMSN 3)作为氮源,在温和条件下可产生中等至优异收率的各种酰胺。这种异质的膦金(I)络合物显示出与均相的氯(三苯基膦)金(I)相同的营业额(Ph 3PAuCl)并可以通过简单过滤反应溶液而容易地回收,并循环至少八次而没有明显的活性损失,为从炔烃合成酰胺提供了一种新颖,有效,实用和经济的方法。
<scp>Iron‐Catalyzed</scp> Amide Bond Formation from Carboxylic Acids and Isocyanates<sup>†</sup>
作者:Lingjian Zi、Jing Zhang
DOI:10.1002/cjoc.202300396
日期:2023.12
We describe an iron-catalyzed amidebondformation from readily available carboxylic acids and isocyanates. This method utilizes an abundant and biocompatible iron catalyst and easily accessible starting materials, generates CO2 as the only byproduct, and features broad substrate scopes with good functional group compatibility. Therefore, it provides a cost-effective and practical protocol to access