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• W2155993325 abstract "A new synthesis of 2,3-dihydro-1,3-methano-1H-indene (3) has been designed with bicyclo[2.1.1]hex-2-ene serving as starting material, which was added onto chloro-substituted α-pyrones. The title hydrocarbon 3 was then obtained in two subsequent steps. The AA′MM′ 1H NMR spectrum of 3 was analyzed and simulated, leading to corrections of previously published coupling constants. The 13C NMR signal of the methylene carbon atoms appears at particularly low field (δ = 63.3 ppm). This finding is discussed together with anomalous low- and high-field absorptions of methylene carbon atoms of cyclobutanes and bridgehead carbon atoms of bicyclo[1.1.0]butanes, the 1,3- and 2,4-positions of which, respectively, are bridged by π electron systems. As a result, moieties with (4n + 2) π electrons cause deshieldings, whereas those having 4n π electrons evoke shieldings." @default.
• W2155993325 created "2016-06-24" @default.
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• W2155993325 date "2015-08-25" @default.
• W2155993325 modified "2023-09-27" @default.
• W2155993325 title "A Novel Synthesis of 2,3-Dihydro-1,3-­methano-1H-indene {(Bicyclo[2.1.1]hexeno)benzene} and Analysis of Its NMR Spectra" @default.
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• W2155993325 doi "https://doi.org/10.1002/ejoc.201500831" @default.
• W2155993325 hasPublicationYear "2015" @default.
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