PMR study on the structures of products from 1,3-dipolar cycloaddition of C-benzoyl-N-phenylnitrone to dihydrofuran derivatives
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Abstract
PMR spectra have been examined for isomeric exo and endo products formed from C-benzoyl-N-phenylnitrone and dihydrofuran derivatives. A lanthanoid-shift reagent and the homonuclear Overhauser effect serve to define the stearic structures.
Keywords
Dihydrofuran Dihydrofuran Derivative Endo Product
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Literature cited
- 1.L. Fišera, M. Dandarova, J. Kováč, et al., “1-3-Dipolar cycloaddition of C-benzoylnitrone with dihydrofuran derivatives. Investigation of endo-exo stereoselectivity,” Coll. Czech. Chem. Commun., 47, No. 2, 523–534 (1982).Google Scholar
- 2.L. Fišera, M. Dandarova, J. Kováč, et al., “Cycloadditions of C-benzoylnitrone with furocondensed derivatives,” ibid., 46, No. 10, 2421–2427 (1981).Google Scholar
- 3.M. Karplus, “Theory of proton coupling constants in unsaturated molecules,” J. Am. Chem. Soc., 82, No. 20, 4431–4432 (1960).Google Scholar
- 4.C. A. G. Haasnoot, F. A. A. M. De Leeuw, and C. Alona, “The relationship between proton-proton NMR coupling constants and substituent electronegativities. 1.,” Tetrahedron, 36, No. 18, 2783–2792 (1980).Google Scholar
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© Plenum Publishing Corporation 1990