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.
Detection and Elimination of Product Inhibition from the Asymmetric Catalytic Hydrogenation of Enamines
作者:Karl B. Hansen、Thorsten Rosner、Michele Kubryk、Peter G. Dormer、Joseph D. Armstrong
DOI:10.1021/ol051862d
日期:2005.10.1
text] The catalytic asymmetric hydrogenation of enamine amides and esters with catalyst Rh-1a, prepared from ferrocenyl based ligand 1a or 1b and [(COD)RhCl](2), has been shown through kinetic studies to suffer fromproduct inhibition. Enamine ester substrates have also been shown to be incompatible with the amine products of the reaction in methanol. In situ protection of the amine products with di-tert-butyl
Dihydropyridine anti-allergic and antiinflammatory agents
申请人:Pfizer Inc.
公开号:US04788205A1
公开(公告)日:1988-11-29
Certain 4-aryl-5-carbamoyl-1,4-dihydropyridines useful in the treatment of allergic and inflammatory conditions in mammals.
某些对哺乳动物中的过敏和炎症症状治疗有用的4-芳基-5-氨基甲酰基-1,4-二氢吡啶。
Microwave-Mediated Domino Reactions in Dry Medium. Preparation of Dihydropyridinones and Pyridinones Structurally Related to Hantzsch Esters.
作者:Jean Jacques Vanden Eynde、Nadège Labuche、Yves Van Haverbeke
DOI:10.1080/00397919708007288
日期:1997.11
Abstract Microwave irradiation of mixtures of 4-arylmethylene-2-phenyloxazol-5(4H)-ones and enaminocarbonyl compounds, in the absence of solvent, affords dihydropyridinone derivatives in quantitative yields. From 4-ethoxymethylene-2-phenyloxazol-5(4H)one and enaminocarbonyl compounds, pyridinone derivatives are obtained.
Synthesis of Tetrasubstituted NH Pyrroles and Polysubstituted Furans via an Addition and Cyclization Strategy
作者:Zheng-Hui Guan、Liang Li、Mi-Na Zhao、Zhi-Hui Ren、Jianli Li
DOI:10.1055/s-0031-1289993
日期:2012.2
enamino esters with nitroolefins provides a straightforward and general method for the synthesis of tetrasubstituted NH pyrroles. This novel method tolerates a wide range of functionality, and allows for rapid elaboration of the nitroolefins into a variety of substituted pyrroles in good yields. Further, an efficient KOAc-promoted addition and cyclization protocol toward substituted furans has been
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Formation of RSCl/ArSeCl and Their Oxidative Coupling with Enaminone Derivatives Under Transition‐metal Free Conditions
作者:Zhenhua Shang、Qingyu Chen、Linlin Xing、Yilin Zhang、Laura Wait、Yunfei Du
DOI:10.1002/adsc.201900940
日期:2019.11.5
The reaction of diorganyl disulfides or diselenides with PhICl2 in DMF at room temperature led to the in situ formation of the reactive organosulfenyl chloride (RSCl) or selenenyl chloride (ArSeCl), which reacted with enaminone compounds to afford a series of α‐thioenaminones or α‐selenylenaminones, respectively, including the bioactive inhibitor for Cdc25B and its analogue, via the intermolecular