Investigation of 2,5-disubstituted silylfurans by PMR spectroscopy |
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Authors: | É Lukevits L E Demicheva Yu Yu Popelis |
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Institution: | (1) Latvian Institute of Organic Synthesis, Riga |
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Abstract: | The1H,13C, and29Si NMR spectra of S-substituted furfurals and the corresponding diethyl acetals containing various alkylsilyl substituents at position S of the furan ring were studied in comparison with the carbon- and sulfur-containing analogs and also with a series of monosubstituted silylfurans. In cases where the substituent was conjugated with the residue of the furan molecule the effect of the substituent at position S of the furan was transmitted to C of the aldehyde group. The reverse effect was also observed. It was determined that the contribution from the aldehyde group and the substituents at position S of the furan to the screening of the carbon nuclei of the furan ring was not additive.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 449457, April, 1996. |
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