Cu(TFA)2-Catalyzed Oxidative Tandem Cyclization/1,2-Alkyl Migration of Enamino Amides for Synthesis of Pyrrolin-4-ones
摘要:
A novel Cu(TFA)(2)-catalyzed oxidative tandem cyclization/1,2-alkyl migration of readily available enamino amides for the synthesis of pyrrolin-4-ones has been developed. The reaction tolerates a wide range of functional groups and is a reliable method for the rapid synthesis of substituted pyrrolin-4-ones in high yields under mild conditions.
highly substituted pyrrolin-4-ones is developed via the PIFA-mediated cyclization reactions of readily available enaminones, and a mechanism involving sequential cleavage of N-C bond, formation of new N-C bond, intramolecular addition reaction, and benzilicacid type rearrangement is proposed.
H<sub>2</sub>O<sub>2</sub>-Promoted Reactions of Aliphatic Primary Amines with 1,3-Diketones for the Synthesis of 1<i>H</i>-Pyrrol-3(2<i>H</i>)-ones at Ambient Temperature in Water
作者:Xi Sun、Pinhua Li、Xiuli Zhang、Lei Wang
DOI:10.1021/ol500546p
日期:2014.4.18
A green organic reaction of aliphaticprimaryamines with 1,3-diketones promoted by 30% aqueous H2O2 has been developed. It provides an inexpensive, regioselective, and efficient approach to 1H-pyrrol-3(2H)-ones with high yields from the simple and readily available starting materials in one pot via multicomponent tandem cyclization reactions and C–C cleavage under very mild and environmentally friendly
已经开发出脂肪族伯胺与由30%H 2 O 2水溶液促进的1,3-二酮的绿色有机反应。它提供了一种廉价,区域选择性和有效的方法,可通过多组分串联环化反应和在非常温和的条件下进行C–C裂解,从一个罐中简单易用的起始原料中高产率地制得1 H-吡咯-3(2 H)-酮和环境友好的反应条件。
Photooxidative Reaction of β-Oxoamides with Amines for the Synthesis of Pyrrolin-4-ones under External Photocatalyst-Free Conditions
作者:Aanuoluwapo O. Oyejobi、Jie Huang、Yun-Xuan Luo、Xiang-Ying Tang、Long Wang
DOI:10.1021/acs.joc.4c00833
日期:2024.7.19
The incorporation of oxygen atoms from air under aerobic conditions plays an important role in organic synthesis. Herein, Brønsted acids are found to be a two-in-one strategic catalyst to transform enamines from β-oxoamides and amines to pyrrolin-4-ones without an external photocatalyst under visible-light conditions. The Brønsted acid can inhibit the C–C bond fragmentation of the [2 + 2] adduct from
在有氧条件下从空气中引入氧原子在有机合成中起着重要作用。在此,布朗斯台德酸被发现是一种二合一的战略催化剂,在可见光条件下无需外部光催化剂即可将烯胺从β-氧代酰胺和胺转化为吡咯啉-4-酮。布朗斯台德酸可以抑制烯胺和1 O 2生成的[2 + 2]加合物的 C-C 键断裂,但最重要的是,它可以通过酸变色作用与烯胺和吡咯啉-4-酮产物形成光敏剂,促进1 O 2代。
Adembri Giorgio, Celli Angela M., Lampariello Lucia R., Scotton Mirella, +, Tetrahedron Lett, 35 (1994) N 23, S 4023-4026
作者:Adembri Giorgio, Celli Angela M., Lampariello Lucia R., Scotton Mirella, +