通过伴随的裂解和 C(sp 2 )-N 键的形成,实现了苯甲酰肼/咔巴酸酯和伯/仲胺作为偶联伙伴的电化学酰胺化。该方法在无金属和无外源氧化剂的条件下进行,产生 N 2和 H 2作为副产物。机理研究揭示了来自苯甲酰肼和胺的酰基和N中心自由基的原位生成。该协议的实用性通过大规模合成苯扎贝特(一种高脂血症药物)得到证明。
作者:William I. Nicholson、Fabien Barreteau、Jamie A. Leitch、Riley Payne、Ian Priestley、Edouard Godineau、Claudio Battilocchio、Duncan L. Browne
DOI:10.1002/anie.202106412
日期:2021.9.27
The direct mechanochemical amidation of esters by ball milling is described. The operationally simple procedure requires an ester, an amine, and substoichiometric KOtBu and was used to prepare a large and diverse library of 78 amide structures with modest to excellent efficiency. Heteroaromatic and heterocyclic components are specifically shown to be amenable to this mechanochemical protocol. This
An expedient synthesis of enantioenriched substituted (2-benzofuryl)arylcarbinols via tandem Rap–Stoermer and asymmetric transfer hydrogenation reactions
An expedientsynthesis of enantioenriched substituted (benzofuran-yl)-aryl and heteroaryl carbinols, is described. A key feature of this protocol is synthesis of functionally varied benzofuran scaffolds via a Rap–Stoermer reaction/catalytic asymmetric transfer hydrogenation (ATH) using substituted salicylaldehyde and α-haloaryl, heteroaryl ketones.
Nickel-Catalyzed Amide Bond Formation from Methyl Esters
作者:Taoufik Ben Halima、Jeanne Masson-Makdissi、Stephen G. Newman
DOI:10.1002/anie.201808560
日期:2018.9.24
reactions, the synthesis of amide bonds is accomplished primarily by wasteful methods that proceed by stoichiometric activation of one of the starting materials. We report a nickel‐catalyzed procedure that can enable diverse amides to be synthesized from abundant methylester starting materials, producing only volatile alcohol as a stoichiometric waste product. In contrast to acid‐ and base‐mediated amidations
Preparation of N,N-Dimethyl Aromatic Amides from Aromatic Aldehydes with Dimethylamine and Iodine Reagents
作者:Hideo Togo、Haruka Baba、Katsuhiko Moriyama
DOI:10.1055/s-0031-1290659
日期:2012.5
Various N,N-dimethyl aromaticamides were obtained in good to moderate yields by the reaction of aromaticaldehydes with aqueous dimethylamine in the presence of molecular iodine or 1,3-diiodo-5,5-dimethylhydantoin (DIH) at room temperature. Under the same conditions and using the same procedure, treatment of aromaticaldehydes and morpholine in the presence of DIH also provided the corresponding N-aroyl
Reaction of some coumarin and 4,6-diaryl-2<i>H</i>-pyran derivatives with secondary amines
作者:Ibrahim El-Sayed El-Kholy、Morcos Michael Mishrikey、Hassan Mostafa Feid-Allah
DOI:10.1002/jhet.5570180122
日期:1981.1
The reaction of piperidine, morpholine, piperazine or dimethylamine with several coumarins, 3-bromocoumarin, 4,6-diaryl-2H-pyran-2-ones and 3-bromo-4,6-diaryl-2H-thiopyran-2-ones gave o-hydroxycinnamic acid amides, benzofurans, open-chain δ-oxoamides and thiophene derivatives, respectively.