A mild metal-free C–N bond activation strategy for the direct conversion of inert tertiaryamines with acyl chlorides into tertiary amides via organic photoredox catalysis is presented. In this protocol, a novel organic photocatalyst (Cz-NI-Ph) that showed excellent catalytic performance during C–N bond cleavage is developed. Moreover, this reaction features green and mild conditions, broad substrate
Pivalic anhydride is shown to be an effective reagent for direct amidation of carboxylic acids with N-alkyl anilines. The only by-product of this reaction is nontoxic pivalic acid, which can be easily removed by aqueous workup. The reactions are conducted under mild conditions and found to be compatible with a range of carboxylic acids, including aromatic, heterocyclic, acrylic, and aliphatic carboxylic
Acyl Cyanides as Bifunctional Reagent: Application in Copper-Catalyzed Cyanoamidation and Cyanoesterification Reaction
作者:Zhengwang Chen、Xiaowei Wen、Weiping Zheng、Ruolan He、Dou Chen、Dingsheng Cao、Lipeng Long、Min Ye
DOI:10.1021/acs.joc.9b03500
日期:2020.4.17
Cu-catalyzed domino decyanation and cyanation reaction of acyl cyanides with amines or alcohols have been developed. The cyanosources were generated in situ via C–CN cleavage yielding the corresponding cyano substituted amides or esters in moderate to excellent yields. This approach features a cheap copper catalyst, domino decyanation and cyanation reaction, readily available starting materials, broad
A controllable, light-induced N-dealkylation of tertiary and secondary benzamides bearing primary alkyl substituents at the N-atom is described. The developed reactions take place in an aqueous environment under mild conditions and do not require the presence of surfactants. They can be carried out not only under irradiation with blue LEDs but also under sunlight.
描述了在 N 原子上带有伯烷基取代基的叔和仲苯甲酰胺的可控光诱导N脱烷基化。所开发的反应在温和条件下的水性环境中发生,不需要表面活性剂的存在。它们不仅可以在蓝色 LED 的照射下进行,也可以在阳光下进行。