Aminocarbonylations Employing Mo(CO)<sub>6</sub> and a Bridged Two-Vial System: Allowing the Use of Nitro Group Substituted Aryl Iodides and Aryl Bromides
作者:Patrik Nordeman、Luke R. Odell、Mats Larhed
DOI:10.1021/jo302322w
日期:2012.12.21
A bridged two-vial system aminocarbonylation protocol where Mo(CO)6 functions as an external in situ solid source of CO has been developed. For the first time both nitro group containing aryl/heteroaryl iodides and bromides gave good to excellent yields in the Mo(CO)6-mediated and palladium(0)-catalyzed conversion to benzamides, while the identical one-vessel protocol afforded extensive reduction of
A palladium-catalyzed, microwave assisted carbonylative reaction is described for the synthesis of benzamides fromarylbromides and primary or secondary amines. The developed method uses bis(cyclopentadienyldicarbonyliron) as a solid source of carbon monoxide to produce a diverse set of secondary and tertiary amides in 42–82% yield.
Recyclable Hypervalent Iodine(III) Reagent Iodosodilactone as an Efficient Coupling Reagent for Direct Esterification, Amidation, and Peptide Coupling
作者:Jun Tian、Wen-Chao Gao、Dong-Mei Zhou、Chi Zhang
DOI:10.1021/ol301085v
日期:2012.6.15
hypervalent iodine(III) reagent plays a novel role as an efficient coupling reagent to promote the direct condensation between carboxylicacids and alcohols or amines to provide esters, macrocyclic lactones, amides, as well as peptides without racemization. The regeneration of iodosodilactone (1) can also be readily achieved. The intermediate acyloxyphosphonium ion C from the activation of a carboxylic acid
Hydrosilylative reduction of secondary amides to amines catalyzed by geometry-constrained <i>NNN</i>-cobalt complexes
作者:Shuting Dong、Zhijian Zong、Nan Sun、Baoxiang Hu、Zhenlu Shen、Xinquan Hu、Liqun Jin
DOI:10.1039/d3nj00372h
日期:——
tridentate NNN-cobalt complex for the hydrosilylative reduction of secondary amides with the low-cost PMHS as the hydride donor reductant. In this catalytic protocol, a wide range of secondary amides, including benzamide-type and aliphatic carboxylic acid-derived secondary amides, served as suitable substrates to afford their corresponding secondary amines in moderate to excellent yields. The scaled-up reaction