Highly Efficient and Expedient Synthesis of 5-Hydroxy-1<i>H</i>-pyrrol-2-(5<i>H</i>)-ones from FeCl<sub>3</sub>-Catalyzed Tandem Intramolecular Enaminic Addition of Tertiary Enamides to Ketones and 1,3-Hydroxy Rearrangement
作者:Luo Yang、Chuan-Hu Lei、De-Xian Wang、Zhi-Tang Huang、Mei-Xiang Wang
DOI:10.1021/ol101607z
日期:2010.9.3
Catalyzed by FeCl3 under very mild conditions, tertiary enamides underwent a highly efficient intramolecular enaminic addition reaction to the ketonic carbonyls followed by 1,3-hydroxy rearrangement to produce 5-hydroxy-1H-pyrrol-2(5H)-ones in excellent yields.
Exploring tertiary enamides as versatile synthons in organic synthesis
作者:Mei-Xiang Wang
DOI:10.1039/c4cc10327k
日期:——
Tertiary enamides have long been thought of as stable and marginally valuable enamine variants in synthesis. This notion has been challenged, however, in recent years. Enabling the regulation of the cross-conjugation system of the tertiary enamides has been successfully shown to enhance delocalization of the nitrogen lone-pair electrons into a carbon-carbon double, thereby reinvigorating the enaminic
Cr(III)(salen)Cl Catalyzed Enantioselective Intramolecular Addition of Tertiary Enamides to Ketones: A General Access to Enantioenriched 1<i>H</i>-Pyrrol-2(3<i>H</i>)-one Derivatives Bearing a Hydroxylated Quaternary Carbon Atom
作者:Luo Yang、De-Xian Wang、Zhi-Tang Huang、Mei-Xiang Wang
DOI:10.1021/ja904534t
日期:2009.8.5
Cr(III)(salen)Cl complex 3e, tertiaryenamides 1 underwent an efficient and enantioselectiveintramolecularaddition reaction to an activated carbonyl moiety to produce in excellent yield highly enantioenriched 1H-pyrrol-2(3H)-one derivatives 2 that bear a hydroxylated quaternary carbon atom. The synthetic application of resulting compounds has been demonstrated in the synthesis of (3S,5S)-3,5-diphenyl-3-pyrrolidinol
在手性 Cr(III)(salen)Cl 配合物 3e 的催化下,叔烯酰胺 1 与活性羰基部分进行了有效且对映选择性的分子内加成反应,以优异的产率产生了高度对映体富集的 1H-吡咯-2(3H)-one 衍生物 2带有羟基化季碳原子。所得化合物的合成应用已在(3S,5S)-3,5-二苯基-3-吡咯烷醇的合成中得到证明。