- Organocatalytic Cloke-Wilson Rearrangement: DABCO-Catalyzed Ring Expansion of Cyclopropyl Ketones to 2,3-Dihydrofurans
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An organocatalytic Cloke-Wilson rearrangement of cyclopropyl ketones to 2,3-dihydrofurans is exploited utilizing the homoconjugate addition process. With 1,4-diazabicyclo[2.2.2]octane as the catalyst, the rearrangement in DMSO at 120 °C proceeded in gener
- Zhang, Jingfang,Tang, Yuhai,Wei, Wen,Wu, Yong,Li, Yang,Zhang, Junjie,Zheng, Yuansuo,Xu, Silong
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p. 3043 - 3046
(2017/06/23)
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- Cooperative Indium(III)/Silver(I) System for Oxidative Coupling/Annulation of 1,3-Dicarbonyls and Styrenes: Construction of Five-Membered Heterocycles
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A cooperative indium(III)/silver(I) system for the synthesis of various five-membered heterocycles, including dihydrofurans, pyrroles, spirolactones, and spiroiminolactones, through the sequential oxidative coupling/annulation reaction of 1,3-dicarbonyl compounds with styrenes has been developed. Four different heterocyclic systems were successfully synthesized depending on the substitution pattern of the substrates using readily available starting materials. This system has the advantages of a broad substrate scope, moderate to good chemical yields, an operationally easy and simple procedure, and short reaction times. (Figure presented.) .
- Ko, Tae Yun,Youn, So Won
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supporting information
p. 1934 - 1941
(2016/07/06)
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- Synthesis of 9-aryl-9,10-dihydrophenanthrenes by domino [3+3] annulation/ring-opening/Friedel-Crafts alkylation reactions of 1,3-bis(trimethylsilyloxy)-1,3-butadienes with 3-aroyl-5-aryl-4,5-dihydrofurans
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The reaction of 1,3-bis(trimethylsilyloxy)-1,3-butadienes with 3-benzoyl-5-aryl-4,5-dihydrofurans, available by CANmediated reaction of styrenes with benzoylacetones, af-forded functionalized 9,10- dihydrophenanthrenes. These reactions proceed by a novel domino [3+3] cyclization/ringopening/ Friedel-Crafts alkylation process.
- Lau, Matthias,Sher, Muhammad,Villinger, Alexander,Fischer, Christine,Langer, Peter
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experimental part
p. 5118 - 5127
(2010/11/03)
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- Solvent-dependent oxidative coupling of 1-aryl-1,3-dicarbonyls and styrene
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This report describes the scope and mechanism of the solvent-dependent, chemoselective oxidative coupling of 1-aryl-1,3-dicarbonyls with styrene using Ce(IV) reagents. Dihydrofuran derivatives are obtained when reactions are performed in methanol whereas
- Casey, Brian M.,Eakin, Cynthia A.,Jiao, Jingliang,Sadasivam, Dhandapani V.,Flowers II, Robert A.
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experimental part
p. 10762 - 10768
(2010/02/28)
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