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.
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。