On June 30, 1988, Redondo, Jordi; Sanchez-Ferrando, Francisco; Valls, Montserrat; Virgili, Albert published an article.Electric Literature of 53724-96-2 The title of the article was Selective heteronuclear NOE enhancements in benzoheterocycles. Effect of ring size on indirect three-spin effects. And the article contained the following:
The 80 MHz 1H NMR and 20 MHz 13C NMR spectra of 5 4-methylcoumarins, 6 4-methyl-2(1H)-quinolones and 9 3-methylbenzo[b]furans, including 6 new compounds, were fully assigned. Homonuclear 1H〈1H〉 NOEs and selective heteronuclear 13C〈1H〉 NOEs were measured after low-power pre-saturation of the Me protons. Indirect, neg. heteronuclear NOE enhancements were found in suitable 3-spin systems of the 13C-1H-〈1H〉 type, and their magnitude was dependent on ring size. The 1st examples of indirect, heteronuclear NOE enhancements on non-protonated carbons are described. The experimental process involved the reaction of Ethyl 6-methoxy-3-methylbenzofuran-2-carboxylate(cas: 53724-96-2).Electric Literature of 53724-96-2
The Article related to benzoheterocycle noe heteronuclear, nmr benzoheterocycle, Physical Organic Chemistry: Resonance Spectra (Electron Spin, Nuclear Magnetic and Fourier Transform Nuclear Magnetic, Quadrupole, etc.) and other aspects.Electric Literature of 53724-96-2
Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem