FeCl 3通过环醚的裂解和裂解从1-(2-氨基苯基)吡咯催化合成吡咯并[1,2- a ]喹喔啉衍生物
摘要:
一种直接的铁催化从1-(2-氨基苯基)吡咯和环醚合成吡咯并[1,2- a ]喹喔啉的方法,包括C(sp 3)-H键的官能化和C–的构建已经开发了C和C–N键。该反应的特征是铁催化,低成本和易于获得的起始原料。此外,该方法表现出良好的官能团耐受性,并且以中等至良好的产率获得了一系列吡咯并[1,2- a ]喹喔啉衍生物。
Direct Synthesis of Pyrrolo[1,2-α]quinoxalines <i>via</i> Iron-Catalyzed Transfer Hydrogenation between 1-(2-Nitrophenyl)pyrroles and Alcohols
作者:Simin Chun、Jiwon Ahn、Ramachandra Reddy Putta、Seok Beom Lee、Dong-Chan Oh、Suckchang Hong
DOI:10.1021/acs.joc.0c02145
日期:2020.12.4
Herein, we describe novel iron-catalyzed transferhydrogenation between alcohols and 1-(2-nitrophenyl)pyrroles for the synthesis of pyrrolo[1,2-α]quinoxalines. The tricarbonyl (η4-cyclopentadienone) iron complex catalyzed the oxidation of alcohols and the reduction of nitroarenes, and the corresponding aldehydes and aniline were generated in situ. The resulting Pictet–Spengler-type annulation/oxidation
A ruthenium-catalyzed [5+1] annulation of 1-(2-aminophenyl)pyrroles with α-carbonyl sulfoxonium ylides is reported. This reaction provides a one-step method for synthesizing pyrrolo[1,2-a]quinoxaline derivatives under ambient conditions. The system proceeds with a short reaction time and a high functional-group tolerance. Notably, this divergent protocol tolerates β-keto sulfoxonium ylides and can
Copper-catalyzed tandem aerobic oxidative cyclization for the synthesis of 4-cyanoalkylpyrrolo[1,2-<i>a</i>]quinoxalines from 1-(2-aminophenyl)pyrroles and cyclobutanone oxime esters
作者:Zhenyu An、Yong Jiang、Xin Guan、Rulong Yan
DOI:10.1039/c8cc06256k
日期:——
A copper-catalyzed tandem ring-opening/cyclization reaction for the synthesis of 4-cyanoalkylpyrrolo[1,2-a]quinoxalines from 1-(2-aminophenyl)pyrroles and cyclobutanone oxime esters has been developed. This reaction involves C–C bond cleavage and C–C and C–N bond constructions with good functional group tolerance. A wide range of products are obtained in moderate to good yields under mild conditions
已开发了一种铜催化串联开环/环化反应,用于由1-(2-氨基苯基)吡咯和环丁酮肟酯合成4-氰基烷基吡咯并[1,2- a ]喹喔啉。该反应涉及C–C键断裂以及具有良好官能团耐受性的C–C和C–N键结构。在温和的条件下,可以以中等到良好的产率获得各种各样的产品。
Synthesis of 4-Aryl Pyrrolo[1,2-α]quinoxalines <i>via</i> Iron-Catalyzed Oxidative Coupling from an Unactivated Methyl Arene
作者:Jiwon Ahn、Seok Beom Lee、Injae Song、Simin Chun、Dong-Chan Oh、Suckchang Hong
DOI:10.1021/acs.joc.1c00371
日期:2021.6.4
Herein, we describe the direct synthesis of pyrrolo[1,2-α]quinoxaline via oxidative coupling between methyl arene and 1-(2-aminophenyl) pyrroles. Oxidation of the benzylic carbon of the methyl arene was achieved by di-t-butyl peroxide in the presence of an iron catalyst, followed by conversion to an activated aldehyde in situ. Oxygen played a crucial role in the oxidation process to accelerate benzaldehyde
TFAA‐Catalyzed Annulation Synthesis of Spiro Pyrrolo[1,2‐
<i>a</i>
]quinoxaline Derivatives from 1‐(2‐Aminophenyl)pyrroles and Benzoquinones/Ketones
作者:Jixiang Ni、Yong Jiang、Zhenjie Qi、Rulong Yan
DOI:10.1002/asia.201900567
日期:——
A metal-free trifluorosulfonate anhydride (TFAA)-catalyzed strategy for the synthesis of spiro pyrrolo[1,2-a]quinoxalines from 1-(2-aminophenyl)pyrroles and benzoquinones/ketones has been developed. With this general method, spiro pyrrolo[1,2-a]quinoxalines have been accessed via nucleophilic addition and cyclization. This reaction exhibits good functional group tolerance, and a wide range of products