Efficient Syntheses of New 2,2′-Disubstituted-2,3-dihydrofuran Derivatives and Natural Polyketide Analogues
作者:Sylvia Fernandes、Sujata V. Bhat
DOI:10.1080/00397911.2014.905603
日期:2014.10.2
Abstract Efficient syntheses of new 2,2′-disubstituted-2,3-dihydrofuran(5H)-4-one,spirobenzofuran-2,2′-bicyclo[2.2.1]heptan}-4(5H)-one derivatives, and natural polyketide analogues have been achieved via the oxidative [3 + 2] cycloaddition of 1,3-dicarbonyl compounds with monoterpenes myrcene, camphene, and natural phenyl propenes, namely anethole and safrole respectively. Interestingly, the reaction
Synthesis of multi-substituted dihydrofurans <i>via</i> palladium-catalysed coupling between 2,3-alkadienols and pronucleophiles
作者:Hirokazu Tsukamoto、Kazuya Ito、Takayuki Doi
DOI:10.1039/c8cc02589d
日期:——
Multi-substituted dihydrofurans were obtained from a palladium-catalysed coupling reaction between 2,3-alkadienols and ketones bearing an electron-withdrawing group at the α-position. Methanol as a solvent was essential for the initial dehydrative substitution to suppress the competitive hydroalkylation of the diene moiety. The substitution would be followed by intramolecular hydroalkoxylation under
Cycloaddition Reactions of Iodonium Ylides of Cyclic <i>β</i>-Diketones with 1,3-Dienes: Evidence for a Stepwise Mechanism
作者:Ioannis Alexiou、Efstathios P. Gogonas、Lazaros P. Hadjiarapoglou
DOI:10.1055/s-1999-2970
日期:1999.12
The irradiation of a cyclic β-dicarbonyl iodonium ylide with 1,3-diene in acetonitrile gives substituted dihydrofurans in moderate to high yields, presumably via a stepwise mechanism.