The Journal of Organic Chemistry

Direct observation of acyl anion equivalents by carbon-13 Fourier transform nuclear magnetic resonance

FT Oakes, JF Sebastian

Index: Oakes, Fred T.; Sebastian, John F. Journal of Organic Chemistry, 1980 , vol. 45, # 24 p. 4959 - 4961

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Citation Number: 41

Abstract

The vinyl anions derived from 2, 3-dihydrofuran, 2, 3-dihydro-4H-pyran, and ethoxyethene have been examined by carbon-13 FT NMR. The vinyl CH coupling constants (1J13C-~~) have been measured for the ethers and the anions. Observation of vinyl anions derived from vinyl ethers is readily accomplished with carbon-13 NMR. While all carbon resonances are shifted upon formation of the anion the most obvious effect is the large (56-61 ppm) ...